diff --git a/doc/dox/whatsnew.dox b/doc/dox/whatsnew.dox
index 6485321c9e..494f6c354f 100644
--- a/doc/dox/whatsnew.dox
+++ b/doc/dox/whatsnew.dox
@@ -47,7 +47,7 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>NEW: improved frac-rendering: font-scaling takes nesting-level into account, overall-rendering, sizes, if a brace surrounds a frac, the heights are equal above and below to center the brace , ...</li>
     <li>NEW: shows strikeoutPos when drawing Debug-Boxes</li>
     <li>NEW: LaTeX-Parser understands optional instruction parameters in [...] now</li>
-    <li>NEW: LaTeX-Parser simplifies parrse-tree to increase speed of execution</li>
+    <li>NEW: LaTeX-Parser simplifies parse-tree to increase speed of execution</li>
     <li>NEW: \limits and \nolimits works as in LaTeX now (before it was simply removed and the functionality implemented for a fixed list of symbols)</li>
     <li>NEW: added top-corner (\ulcorner/\urcorner) and bottom-corner brackets (\llcorner/\lrcorner)</li>
     <li>NEW: added \overbracket and \underbracket</li>
diff --git a/examples/jkqtmathtext_test/testform.cpp b/examples/jkqtmathtext_test/testform.cpp
index ce3ce5cf12..45ce7f86c6 100644
--- a/examples/jkqtmathtext_test/testform.cpp
+++ b/examples/jkqtmathtext_test/testform.cpp
@@ -369,7 +369,8 @@ QTreeWidgetItem *TestForm::createTree(JKQTMathTextNode *node, QTreeWidgetItem* p
         if (fracN->getChild1()) ti->addChild(createTree(fracN->getChild1(), ti));
         if (fracN->getChild2()) ti->addChild(createTree(fracN->getChild2(), ti));
     } else if (sqrtN)  {
-        name=QString("MTsqrtNode: deg=%1").arg(sqrtN->getDegree());
+        name=QString("MTsqrtNode");
+        if (sqrtN->getChildDegree()) ti->addChild(createTree(sqrtN->getChildDegree(), ti));
         if (sqrtN->getChild()) ti->addChild(createTree(sqrtN->getChild(), ti));
     } else if (braceN)  {
         name=QString("MTbraceNode: l='%1', r='%2'").arg(JKQTMathTextBraceType2String(braceN->getOpenbrace())).arg(JKQTMathTextBraceType2String(braceN->getClosebrace()));
diff --git a/lib/jkqtmathtext/jkqtmathtext.cpp b/lib/jkqtmathtext/jkqtmathtext.cpp
index e8b14ced3c..27eb754957 100644
--- a/lib/jkqtmathtext/jkqtmathtext.cpp
+++ b/lib/jkqtmathtext/jkqtmathtext.cpp
@@ -1146,7 +1146,7 @@ JKQTMathTextNode* JKQTMathText::parseLatexString(bool get, JKQTMathTextBraceType
                 if (currentInstructionName=="sqrt") {
                     nl->addChild(new JKQTMathTextSqrtNode(this, parseLatexString(true)));
                 } else if (currentInstructionName=="cbrt") {
-                    nl->addChild(new JKQTMathTextSqrtNode(this, parseLatexString(true), 3));
+                    nl->addChild(new JKQTMathTextSqrtNode(this, parseLatexString(true), new JKQTMathTextTextNode(this, "3", false)));
                 } else if (currentInstructionName=="verb") {
                     QString text="";
                     currentTokenID++;
@@ -1370,24 +1370,11 @@ JKQTMathTextNode* JKQTMathText::parseLatexString(bool get, JKQTMathTextBraceType
                 //std::cout<<"found '[' after '"<<name.toStdString()<<"'\n";
                 if (currentInstructionName=="sqrt") {
                     JKQTMathTextNode* n1=parseLatexString(true, MTBTAny, "", true);
-                    JKQTMathTextListNode* n1lst=dynamic_cast<JKQTMathTextListNode*>(n1);
-                    JKQTMathTextTextNode* n1txt=dynamic_cast<JKQTMathTextTextNode*>(n1);
-                    if (n1lst && n1lst->childCount()==1) {
-                        n1txt=dynamic_cast<JKQTMathTextTextNode*>(n1lst->getChild(0));
-                    }
-                    int degree=2;
-                    bool ok=false;
-                    if (n1txt) degree=n1txt->getText().toInt(&ok);
-                    if (!ok) {
-                        degree=2;
-                        error_list.append(tr("error @ ch. %1: an integer in [] after '%2' command").arg(currentTokenID).arg(currentInstructionName));
-                    }
-
                     JKQTMathTextNode* n2=nullptr;
                     if (getToken()==MTTopenbrace) n2=parseLatexString(true);
                     else error_list.append(tr("error @ ch. %1: expected one argument in '{' braces after '%2' command with an optional argument in []").arg(currentTokenID).arg(currentInstructionName));
 
-                    if (n1 && n2) nl->addChild(new JKQTMathTextSqrtNode(this, n2, degree));
+                    if (n1 && n2) nl->addChild(new JKQTMathTextSqrtNode(this, n2, n1));
                     else error_list.append(tr("error @ ch. %1: expected two arguments in '{' braces after '%2' command").arg(currentTokenID).arg(currentInstructionName));
                 } else {
                     nl->addChild(new JKQTMathTextTextNode(this, "[", false));
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.cpp b/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.cpp
index 66d072e981..bd8a44d535 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.cpp
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.cpp
@@ -35,21 +35,24 @@
 
 
 
-JKQTMathTextSqrtNode::JKQTMathTextSqrtNode(JKQTMathText* _parent, JKQTMathTextNode* child, int degree):
-    JKQTMathTextSingleChildNode(child, _parent)
+JKQTMathTextSqrtNode::JKQTMathTextSqrtNode(JKQTMathText* _parent, JKQTMathTextNode* child__, JKQTMathTextNode *childDegree__):
+    JKQTMathTextMultiChildNode(_parent),
+    child(child__), childDegree(childDegree__)
 {
-    this->degree=degree;
+    if (child) child->setParentNode(this);
+    if (childDegree) childDegree->setParentNode(this);
 }
 
 JKQTMathTextSqrtNode::~JKQTMathTextSqrtNode() {
+    if (child) delete child; child=nullptr;
+    if (childDegree) delete childDegree; childDegree=nullptr;
 }
 
 void JKQTMathTextSqrtNode::getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* /*prevNodeSize*/) {
     const QFontMetricsF fm(currentEv.getFont(parentMathText), painter.device());
-    QFont fsmall=currentEv.getFont(parentMathText);
-    fsmall.setPointSizeF(fsmall.pointSizeF()*parentMathText->getSqrtSmallFontFactor());
-    fsmall.setItalic(false);
-    const QFontMetricsF fmsmall(fsmall, painter.device());
+    JKQTMathTextEnvironment evSmall=currentEv;
+    evSmall.fontSize=currentEv.fontSize*parentMathText->getSqrtSmallFontFactor();
+    evSmall.italic=false;
 
     getChild()->getSize(painter, currentEv, width, baselineHeight, overallHeight, strikeoutPos);
     const double descent=overallHeight-baselineHeight;
@@ -60,9 +63,9 @@ void JKQTMathTextSqrtNode::getSizeInternal(QPainter& painter, JKQTMathTextEnviro
     overallHeight=newAscent+newDescent;;
     baselineHeight=newAscent;
     width=width+sqrtwidth;
-    if (degree!=2) {
-        const QString degreetext=QLocale::c().toString(degree);
-        const double degwidth=fmsmall.width(degreetext);
+    if (childDegree) {
+        double degwidth=0, degBH=0, degOH=0, degSP=0;
+        childDegree->getSize(painter, evSmall, degwidth, degBH, degOH, degSP);
         const double smalltextIndent=0.6*sqrtwidth;
         if (degwidth>smalltextIndent) width=width+(degwidth-smalltextIndent);
     }
@@ -72,11 +75,10 @@ double JKQTMathTextSqrtNode::draw(QPainter& painter, double x, double y, JKQTMat
     doDrawBoxes(painter, x, y, currentEv);
 
     const QFont f=currentEv.getFont(parentMathText);
-    QFont fsmall=f;
     const QFontMetricsF fm(f, painter.device());
-    fsmall.setPointSizeF(fsmall.pointSizeF()*parentMathText->getSqrtSmallFontFactor());
-    fsmall.setItalic(false);
-    const QFontMetricsF fmsmall(fsmall, painter.device());
+    JKQTMathTextEnvironment evSmall=currentEv;
+    evSmall.fontSize=currentEv.fontSize*parentMathText->getSqrtSmallFontFactor();
+    evSmall.italic=false;
 
     double width=0, baselineHeight=0, overallHeight=0, strikeoutPos=0;
     getChild()->getSize(painter, currentEv, width, baselineHeight, overallHeight, strikeoutPos);
@@ -87,9 +89,10 @@ double JKQTMathTextSqrtNode::draw(QPainter& painter, double x, double y, JKQTMat
     const double linewidth=fm.lineWidth();
     const double tinyhookSize=sqrtwidth*0.1;
     const double smalltextIndent=0.6*sqrtwidth;
-    const QString degreetext=(degree!=2)?QLocale::c().toString(degree):"";
-    const double degwidth=fmsmall.width(degreetext);
-    const double degheight=fmsmall.boundingRect(degreetext).height();
+
+    double degwidth=0, degBH=0, degOH=0, degSP=0;
+    if (childDegree) childDegree->getSize(painter, evSmall, degwidth, degBH, degOH, degSP);
+    const double degheight=degOH;
     const double degree_overwidth=(degwidth>smalltextIndent)?(degwidth-smalltextIndent):0.0;
 
     //painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
@@ -111,7 +114,7 @@ double JKQTMathTextSqrtNode::draw(QPainter& painter, double x, double y, JKQTMat
     const double x_hookbottom=(!useAltForm)?(x_start+0.33*sqrtwidth):(x_start+0.66*sqrtwidth);
     const double x_hooktop=(!useAltForm)?(x_start+sqrtwidth):x_hookbottom;
     const double x_smalltextend=x_start+smalltextIndent;
-    const double y_smalltext=y_top+fmsmall.ascent()+(fabs(y_top-(y_tinyhooktop-linewidth))-degheight)/2.0;
+    const double y_smalltext=y_top+degBH+(fabs(y_top-(y_tinyhooktop-linewidth))-degheight)/2.0;
     if (sqrtwidth>0) {
         QPainterPath path;
         path.moveTo(x_start, y_tinyhooktop+tinyhookSize);
@@ -125,17 +128,25 @@ double JKQTMathTextSqrtNode::draw(QPainter& painter, double x, double y, JKQTMat
         painter.setPen(p);
         painter.drawPath(path);
     }
-    if (degree!=2) {
-        painter.setFont(fsmall);
-        painter.drawText(QPointF(x_smalltextend-degwidth, y_smalltext), degreetext);
+    if (childDegree) {
+        childDegree->draw(painter, x_smalltextend-degwidth, y_smalltext, evSmall);
     }
 
     return xnew;
 }
 
 bool JKQTMathTextSqrtNode::toHtml(QString &html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) {
+    bool ok=true;
+    if (childDegree) {
+        JKQTMathTextEnvironment evSmall=currentEv;
+        evSmall.fontSize=currentEv.fontSize*parentMathText->getSqrtSmallFontFactor();
+        evSmall.italic=false;
+        html=html+"<sup>";
+        ok=ok&&childDegree->toHtml(html, evSmall, defaultEv);
+        html=html+"</sup>";
+    }
     html=html+"&radic;<span style=\"text-decoration:overline\">";
-    bool ok=getChild()->toHtml(html, currentEv, defaultEv);
+    ok=ok&&getChild()->toHtml(html, currentEv, defaultEv);
     html=html+"&nbsp;</span>";
     return ok;
 }
@@ -145,8 +156,71 @@ QString JKQTMathTextSqrtNode::getTypeName() const
     return "MTsqrtNode";
 }
 
-int JKQTMathTextSqrtNode::getDegree() const {
-    return this->degree;
+JKQTMathTextNode *JKQTMathTextSqrtNode::getChild()
+{
+    return child;
 }
 
+const JKQTMathTextNode *JKQTMathTextSqrtNode::getChild() const
+{
+    return child;
+}
+
+JKQTMathTextNode *JKQTMathTextSqrtNode::getChildDegree()
+{
+    return childDegree;
+}
+
+const JKQTMathTextNode *JKQTMathTextSqrtNode::getChildDegree() const
+{
+    return childDegree;
+}
+
+JKQTMathTextNode *JKQTMathTextSqrtNode::getChild(int i)
+{
+    if (i==0) return child;
+    if (i==1) return childDegree;
+    return nullptr;
+}
+
+const JKQTMathTextNode *JKQTMathTextSqrtNode::getChild(int i) const
+{
+    if (i==0) return child;
+    if (i==1) return childDegree;
+    return nullptr;
+}
+
+JKQTMathTextNode *JKQTMathTextSqrtNode::replaceChild(int i, JKQTMathTextNode *newChild)
+{
+    if (i==0) {
+        JKQTMathTextNode* c=child;
+        child=newChild;
+        if (child) child->setParentNode(this);
+        return c;
+    }
+    if (i==1) {
+        JKQTMathTextNode* c=childDegree;
+        childDegree=newChild;
+        if (childDegree) childDegree->setParentNode(this);
+        return c;
+    }
+}
+
+int JKQTMathTextSqrtNode::childCount() const
+{
+    if (childDegree) return 2;
+    return 1;
+}
+
+void JKQTMathTextSqrtNode::clearChildren(bool deleteChildren)
+{
+    if (child) {
+        if (deleteChildren) delete child;
+        child=nullptr;
+    }
+    if (childDegree) {
+        if (deleteChildren) delete childDegree;
+        childDegree=nullptr;
+    }
+}
 
diff --git a/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.h b/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.h
index a14da4087d..52948eddd1 100644
--- a/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.h
+++ b/lib/jkqtmathtext/nodes/jkqtmathtextsqrtnode.h
@@ -40,9 +40,9 @@ class JKQTMathText; // forward
  *  \image html jkqtmathtext/jkqtmathtext_sqrt.png
  *  \image html jkqtmathtext/jkqtmathtext_cbrt.png
   */
-class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSqrtNode: public JKQTMathTextSingleChildNode {
+class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSqrtNode: public JKQTMathTextMultiChildNode {
     public:
-        JKQTMathTextSqrtNode(JKQTMathText* parent, JKQTMathTextNode* child, int degree=2);
+        JKQTMathTextSqrtNode(JKQTMathText* parent, JKQTMathTextNode* child__, JKQTMathTextNode* childDegree__=nullptr);
         virtual ~JKQTMathTextSqrtNode() override;
         /** \copydoc JKQTMathTextNode::draw() */
         virtual double draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSize=nullptr) override;
@@ -50,13 +50,34 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSqrtNode: public JKQTMathTextSingleChi
         virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv) override;
         /** \copydoc JKQTMathTextNode::getTypeName() */
         virtual QString getTypeName() const override ;
-        /** \copydoc degree */
-        int getDegree() const;
+
+        /** \copydoc child */
+        JKQTMathTextNode* getChild();
+        /** \copydoc child */
+        const JKQTMathTextNode* getChild() const;
+        /** \copydoc childDegree */
+        JKQTMathTextNode* getChildDegree();
+        /** \copydoc childDegree */
+        const JKQTMathTextNode* getChildDegree() const;
+
+        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
+        virtual JKQTMathTextNode* getChild(int i) override;
+        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
+        virtual const JKQTMathTextNode* getChild(int i) const override;
+        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
+        virtual JKQTMathTextNode* replaceChild(int i, JKQTMathTextNode* newChild) override;
+        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
+        virtual int childCount() const override;
+        /** \copydoc JKQTMathTextMultiChildNode::getChild() */
+        virtual void clearChildren(bool deleteChildren=true) override;
+
     protected:
         /** \copydoc JKQTMathTextNode::getSizeInternal() */
         virtual void getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* prevNodeSize=nullptr) override;
-        /** \brief degree of the radical (shown of !=2) */
-        int degree;
+        /** \brief child node for the part under the root */
+        JKQTMathTextNode* child;
+        /** \brief second child node for the degree of the root (or nullptr if nothing) */
+        JKQTMathTextNode* childDegree;
 };
 
 #endif // JKQTMATHTEXTSQRTNODE_H