texmath-0.6.7: tests/writers/mtable-05.tex
\begin{array}{cc}
\mathrm{H} & \mathrm{A} \\
\mathrm{T} & \mathrm{I} \\
\mathrm{U} & \mathrm{Y} \\
\end{array}=\begin{array}{cc}
\mathrm{A} & \mathrm{H} \\
\mathrm{I} & \mathrm{T} \\
\mathrm{Y} & \mathrm{U} \\
\end{array}