$x^2+20x+50$
$\frac{tan^2x}{sinx\:sec^2x}$
$14xy+32xy$
$\csc^2ydx=\csc xdy$
$\lim_{x\to0}\left(\frac{lnx}{2x^{-2}}\right)$
$b^2+2b-15=0$
$\left(3x+y\right)^2$
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