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<blockquote>
<p>Here are some examples. Both math:
<img src="/cgi-bin/imgtex.fcgi?{$ f(x)=\int_{-\infty}^xe^{-t^2}dt $}" align="middle" />,
and displaymath:
<img src="/cgi-bin/imgtex.fcgi?{\[ f(x)=\int_{-\infty}^xe^{-t^2}dt \]}" align="middle" />
can be used.
</p>
<p>And colored version:
<img src="/cgi-bin/imgtex.fcgi?{\textcolor{blue}{$ f(x)=\int_{-\infty}^xe^{-t^2}dt $}}" style="vertical-align:middle" />,
and displaymath:
<img src="/cgi-bin/imgtex.fcgi?{\textcolor{red}{\[ f(x)=\int_{-\infty}^xe^{-t^2}dt \]}}" style="vertical-align:middle" />
can be used too (also examples of <tt>style="vertical-align:middle"</tt>).
</p>
<p>You can also write more complicated equations:</p>
<div align="center">
<img src="/cgi-bin/imgtex.fcgi?[res=300]{
\begin{equation*}
A = \begin{pmatrix}
a_{11} & \ldots & a_{1n} \\
\vdots & \ddots & \vdots \\
a_{m1} & \ldots & a_{mn}
\end{pmatrix}
\end{equation*}
}" />
</div>
<div align="center">
<img src="/cgi-bin/imgtex.fcgi?[res=200]{
\[
\frac{\pi}{2} =
\left( \int_{0}^{\infty} \frac{\sin x}{\sqrt{x}} dx \right)^2 =
\sum_{k=0}^{\infty} \frac{(2k)!}{2^{2k}(k!)^2} \frac{1}{2k+1} =
\prod_{k=1}^{\infty} \frac{4k^2}{4k^2 - 1}
\]
}" />
</div>
</blockquote>
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