$\left(\sqrt{x}+x\right)\frac{dy}{dx}=\sqrt{y}+y$
$-n^2m+n$
$2x^2+5x-4x^2+x-x^2$
$\left(3-9y\right)^2$
$2xydx\:+\:\left(x^2-3y^2\right)dy\:=\:0$
$-9-7p$
$\int x\left(\frac{3}{4}x^8+2x\right)dx$
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