fail to generate pdf file when there are equations in a table

[P4SSER8Y]

for example,

# test
test | test | test
:-- | :-- | :--
$x^2+y^2=z$ | $$x^2+y^2=z^2$$ | test

it did well in generating html file.

but if i need to generate pdf file, using default template file of pdf.

...
(d:/Engineering/TeX/texmf-dist/tex/latex/microtype/mt-msb.cfg)
! Missing $ inserted.
<inserted text> 
                $
l.60 \(x^2+y^2=z\) & \[x^
                         2+y^2=z^2\] & test\tabularnewline
? 
...

part of the tex file is (indented by myself)

\section{test}\label{test}
\begin{longtable}[c]{@{}lll@{}}
    \toprule
        test & test & test\tabularnewline
    \midrule
    \endhead
        \(x^2+y^2=z\) & 
        \[x^2+y^2=z^2\] &
        test
        \tabularnewline
    \bottomrule
\end{longtable}

thanks for your contribution!

[jgm]

Apparently LaTeX doesn't like display math in simple tables.

[P4SSER8Y]

Now I just convert markdown file to pdf file with these steps:

1. Convert md to html
2. Prind the html to pdf with Firefox/Chrome