$\int_2^{\infty}\left(x^3e^{-x^2}\right)dx$
$-12+1$
$\frac{cot\left(-t\right)+tan\left(-t\right)}{cot\left(t\right)}=-sec\left(t\right)$
$\left(2m+6\right)\left(2m-8\right)\left(4m^2-3m+1\right)$
$\:16x^2-36z^4$
$\frac{dy}{dx}=\frac{2x-9}{y}$
$4x^2+28x+48$
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