$\left[\frac{1}{5}m+n\right]^2$
$x^{2}-120x+144$
$ln\frac{9+y}{9-y}$
$\frac{dy}{dx}-y+xy^2=0$
$\left(sec\:\theta\:-tan\theta\:\right)\left(csc\theta\:+1\right)$
$\lim_{x\to3}\sqrt{x+1}$
$b^2-34b+289$
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