This is a test file for textools
$\beta$
junk \
(unmatched parentheses))
$dollar sign not closed at the same line
it could be a mistake!$
Input another file
\input inc_file
Try to input a non existing file
\input not_available
$$
{{unclosed braces in equation}
$ this should be a double dollar sign
% commented text is ignored, so unmatching like this (( is ignored.
Insert another file
\include{inc_file2}
but \% this is not a commented text
this \$ is also not a math dollar sign, so it should not give
a matching warning, nor should this \{ escaped left brace.
$$ This is a properly displayed text $$
$((unmatched parentheses)$
LaTeX equation:
\begin{equation}
\alpha + beta =0
\begin{array}

\end{array}
\begin{array}

\end{equation}

\end{equation}