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jkqtmathtext_array.png
$\begin{array}a&b&...\\ c&d&...\end{array}$
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jkqtmathtext_bmatrix.png
$\begin{bmatrix}a&b&...\\ c&d&...\end{bmatrix}$
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jkqtmathtext_bbmatrix.png
$\begin{Bmatrix}a&b&...\\ c&d&...\end{Bmatrix}$
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jkqtmathtext_pmatrix.png
$\begin{pmatrix}a&b&...\\ c&d&...\end{pmatrix}$
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jkqtmathtext_vmatrix.png
$\begin{vmatrix}a&b&...\\ c&d&...\end{vmatrix}$
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jkqtmathtext_vvmatrix.png
$\begin{Vmatrix}a&b&...\\ c&d&...\end{Vmatrix}$
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jkqtmathtext_brace_begincases.png
$f(x)=\begin{cases}\sfrac{1}{2} & \text{if} 0\leq x\leq 1 \\ \sfrac{2}{3} & \text{if} 3\leq x\leq 4 \\ 0 & \text{elsewhere} \end{cases}$