--- jkqtmathtext_brace_stackrel.png $x=\left(\stackrel{1}{2}\right)$ --- MTFMdfrac.png $x=\dfrac{a}{b}+\dfrac{g}{a}+\dfrac{a^2}{b^2}+\dfrac{a^2}{b^\frac{1}{2}}$ --- MTFMfrac.png $x=\frac{a}{b}+\frac{g}{a}+\frac{a^2}{b^2}+\frac{a^2}{b^\frac{1}{2}}$ --- MTFMsfrac.png $x=\sfrac{1}{2},\sfrac{3}{4}$ --- MTFMstfrac.png $x=\stfrac{1}{2},\stfrac{3}{4}$ --- MTFMstackrel.png $x=\stackrel{a}{b}+\stackrel{g}{a}+\stackrel{a^2}{b^2}+\stackrel{a^2}{b^\stackrel{1}{2}}$ --- MTFMtfrac.png $x=\tfrac{a}{b}+\tfrac{g}{a}+\tfrac{a^2}{b^2}+\tfrac{a^2}{b^\tfrac{1}{2}}$ --- MTFMoverbracket.png $f(x)=\overbracket{x+x+\ldots+x}{k\ \text{times}}$ --- MTFMunderbracket.png $f(x)=\underbracket{x+x+\ldots+x}{k\ \text{times}}$ --- MTFMoverbrace.png $f(x)=\overbrace{x+x+\ldots+x}{k\ \text{times}}$ --- MTFMunderbrace.png $f(x)=\underbrace{x+x+\ldots+x}{k\ \text{times}}$ --- MTFMoverset.png $X\overset{=}{\text{def}}Y\ \ \ \ X\overset{=}{!}Y\ \ \ \ \ \frac{\Delta f}{\Delta x}\overset{\longrightarrow}{\Delta x\rightarrow0}f^\prime$ --- MTFMunderset.png $X\underset{=}{\text{def (5)}}Y\ \ \ \ X\underset{\Rightarrow}{f}Y\ \ \ \ \ \frac{\Delta f}{\Delta x}\underset{\longrightarrow}{\Delta x\rightarrow0}f^\prime$