This sample is for testing math syntax 

Some block equations:

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

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

Some inline equations:
{mathinline}E=mc^2{mathinline} is a famous equation. {mathinline}\pi{mathinline} is a famous number.

Escaping percents:
{mathinline}A_{B} = 100\% - C_{D}{mathinline}
{mathinline}A_{B} = 100\% - 200\% + C_{D}{mathinline}