$-\:\left(-10\right)\:-\:\left(5\:+\:-8\right)\:$
$\frac{-1}{3x^2+3x}$
$y=\left(x^3+4x^2\right)^2$
$4x^2-1x+63$
$2\left(x-1\right)\cos\left(x-1\right)^2$
$\left(4m^2-n^2\right)\cdot\left(4m^2+n^2\right)$
$\lim_{x\to0}\left(xe^{-x}\right)$
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