TestMath

$E=mc^{2}$

$A=\int _{0}^{1}{\frac {\ln {x}}{x}}\,\mathrm {d} x$

Failed to parse (syntax error): {\displaystyle \Re{z} =\frac{n\pi \dfrac{\theta +\psi}{2}}{ \left(\dfrac{\theta +\psi}{2}\right)^2 + \left( \dfrac{1}{2} \log \left\lvert\dfrac{B}{A}\right\rvert\right)^2}. }