]> MathML Torture Tests ${x}^{2}{y}^{2}$ $\frac{x+{y}^{2}}{k+1}$ $x+{y}^{\frac{2}{k+1}}$ $\frac{a}{b/2}$ ${a}_{0}+\frac{1}{{a}_{1}+\frac{1}{{a}_{2}+\frac{1}{{a}_{3}+\frac{1}{{a}_{4}}}}}$ $\left(\genfrac{}{}{0}{}{n}{k/2}\right)$ $\left(\genfrac{}{}{0}{}{p}{2}\right){x}^{2}{y}^{p-2}-\frac{1}{1-x}\frac{1}{1-{x}^{2}}$ $\underset{0 ${x}^{2y}$ $\sum _{i=1}^{p}\sum _{j=1}^{q}\sum _{k=1}^{r}{a}_{ij}{b}_{jk}{c}_{ki}$ $\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+x}}}}}}}$ $\left(\frac{{\partial }^{2}}{\partial {x}^{2}}+\frac{{\partial }^{2}}{\partial {y}^{2}}\right){|\left(x+\mathrm{i}y\right)|}^{2}=0$ ${2}^{{2}^{{2}^{x}}}$ $\underset{1}{\overset{x}{\int }}\frac{\mathrm{dt}}{t}$ $\underset{D}{\iint }\mathrm{dx}\mathrm{dy}$ $f\left(x\right)=\left\{\begin{array}{cc}1/3& \text{if}0\le x\le 1;\\ 2/3& \text{if}3\le x\le 4;\\ 0& \text{elsewhere.}\end{array}\right\$ $\stackrel{k\text{times}}{\stackrel{⎴}{x+\cdots +x}}$ ${y}_{{x}^{2}}$ $\sum _{p\text{prime}}f\left(p\right)=\underset{t>1}{\int }f\left(t\right)d\pi \left(t\right)$ $\left\{\underset{k+\mathrm{\ell }\text{elements}}{\underset{⎵}{\stackrel{ka\text{'s}}{\stackrel{⎴}{a,...,a}},\stackrel{\mathrm{\ell }b\text{'s}}{\stackrel{⎴}{b,...,b}}}}\right\}$ $\left(\begin{array}{cc}\left(\begin{array}{cc}a& b\\ c& d\end{array}\right)& \left(\begin{array}{cc}e& f\\ g& h\end{array}\right)\\ 0& \left(\begin{array}{cc}i& j\\ k& l\end{array}\right)\end{array}\right)$ ${y}_{{x}_{2}}$ ${x}_{92}^{31415}+\pi$ ${x}_{{y}_{b}^{a}}^{{z}_{c}^{d}}$ ${y}_{3}^{‴}$