$\frac{\left(x\right)}{\left(\sqrt{x^2-4}\right)}$
$\left(-3x+2i\right)\left(x-6i\right)$
$\frac{1}{cosx}.cscx$
$\frac{z^{-5}}{z^3}$
$x\ln\left(x\right)dy=ydx$
$r^3-8r^2+16r=0$
$\lim_{z\to i}\left(\frac{1+z^{10}}{1+z^{14}}\right)$
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