test new thread

[Thomas Klemm]

The integral from \(a\) to \(b\) of \(x^2\) is:

\[
\int_{a}^{b} x^2 \, dx
\]

Here is a matrix:

\(
\begin{pmatrix}
a & b \\
c & d
\end{pmatrix}
\)

Quote this post to see how it is done.