$\int x\:e^{-2x^2}dx$
$r^2+16=0$
$\frac{dy}{dx}=\frac{e^{-y^2}}{y}\left(x+1\right)$
$\left(-17\right)\cdot14$
$10y^2-xy^2=x^3$
$-x^2-x$
$\cos\left(30\right)\cos\left(45\right)+\sin\left(30\right)\sin\left(45\right)$
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