```
% pandoc -f latex -t latex
\(\left\{ \begin{matrix}
y\,\,\,\, \geqq \,\,\, f\,(\, x\,)\,\, \\
y\,\,\, \leqq \,\,\, g\,(\, x\,)\, \\
\end{matrix} \right.\ \)
^D
\(\left\{ \begin{matrix}
y\,\,\,\, \geqq \,\,\, f\,(\, x\,)\,\, \\
y\,\,\, \leqq \,\,\, g\,(\, x\,)\, \\
\end{matrix} \right.\ \)
```

```
% pandoc -f markdown -t latex
$x\ $
^D
\(x\ \)
```