$\frac{d}{dx}lny=xe^y-2x$
$\int x\:\cdot\:\cos\left(3x-5\right)$
$\frac{1}{1-cosx}=csc^2x\left(1+cosx\right)$
$\left(9-y^9\right)\left(9+y^9\right)$
$\left(3\right)^2-2\left(3\right)\left(4\right)+\left(4\right)^2$
$\lim\:_{y\to+\infty\:}\left(\frac{2y^2-3y}{y+1}\right)$
$4\left(3b-2h\right)^6$
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