$-4.6\:x\:2\:x\:-3$
$\left(3\right)+21\left(3\right)-232$
$7-\left(-32\right)^2$
$a^6-17a^3+72$
$|\:7\:|\:+\:|\:-8\:|\:$
$\int\sqrt{28x-x^2}dx$
$\frac{d}{dx}\left(x^2+y^2=19\right)$
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