$x^2+18x+162$
$\frac{cscx}{tanx\:+cotx}$
$ydx+\left(1+x^2\right)\tan^{-1}\left(x\right)dy=0$
$\int\left(cosh\left(2t\right)\right)dt$
$\tan x\left(\csc x+1\right)=\frac{1+\sin x}{\cos x}$
$3\cot\left(x\right)\sec\left(x\right)$
$\frac{dy}{dr}=\frac{r}{y^2}$
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