This sample is for testing math syntax 

{latex}
\begin{eqnarray}
{
g(x,y)\,
}
\end{eqnarray}
{latex}

{latex}
\begin{eqnarray}
{
f(x) = \int_0^1 e^{-t} g(t) \, dt.
}
\end{eqnarray}
{latex}

Escaping percents:
{latex}
\begin{eqnarray}
{
A_{B} = 100\% - C_{D}
}
\end{eqnarray}
{latex}
{latex}
\begin{eqnarray}
{
A_{B} = 100\% - 200\% + C_{D}
}
\end{eqnarray}
{latex}