**Test**
$\displaystyle \left( {\begin{array}{*{20}{c}}
{{a_{11}}} & {{a_{12}}} \\
{{a_{21}}} & {{a_{22}}} \\
\end{array}} \right)$
$\displaystyle \sum\nolimits_{n = 1}^\infty {{n^2}} $
$\displaystyle \sum\nolimits_{n = 1}^\infty {{n^2}} $
$\displaystyle \sqrt {{a^2} + {b^2}} $
$\displaystyle \sqrt {{a^2} + {b^2}} $
So mathml now works here, that's really useful.
not sure what's wrong with the tex version though.
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Last edited by studiot; Mar 31st 2017 at 04:19 PM.
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