$\int xe^{\frac{-x}{2}}dx$
$\left(2x-2\right)\left(2x+8\right)$
$-9\:-\:\left(-5\right)\:.\:3\:-\:14\::\:\left(-2\right)\:-\:2\:.\:\left(-3\right)\:-\left[4-\left(-4\right)\::\:\left(-1\right)\right]$
$x^2-7x+49$
$7\frac{dy}{dx}=\sqrt{x+3}-x+2$
$\frac{m^6-d^{12}}{m+d^2}$
$4d\:3\:-\:22d\:+\:17b\:-\:9b\:+\:17d\:3\:-\:11d$
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