$\left(x-32\right)\left(x+50\right)$
$\frac{dy}{dx}=x^2\left(1-3y\right)$
$\int4cos^32xdx$
$60+-1$
$\frac{7}{2}x-9$
$9x^2+6x+1=9x\:2\:+6x+1$
$\frac{1+\sqrt{x+7}}{\sqrt{x+7}}$
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