\DocumentMetadata{
  uncompress,
  pdfversion = 2.0,
  testphase = {phase-III,table,math},
}
\input{regression-test}
\documentclass{article}
\usepackage{unicode-math}

\begin{document}
\ExplSyntaxOn
\luamml_set_filename:n {
    \jobname .mml
  }
\luamml_process:  
\luamml_begin_single_file:
\ExplSyntaxOff

\[
  \left(\begin{matrix}
    1 & 0 & 0 \\
    0 & 1 & 0 \\
    0 & 0 & 1
  \end{matrix}\right)
  =
  \begin{cases}
    1 & \mbox{if $a=b$}\\
    2 & \mbox{else}
  \end{cases}
\]

\[
  x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}.
\]

\[
  \sum_a\underline c\dot bc'
\]

Es gilt $\sin(x)-\sin(x+2\pi)=0$.
\ExplSyntaxOn
\luamml_end_single_file:
\ExplSyntaxOff
\end{document}