$-1x^2+2x+3$
$-n+9\left(-2n-11\right)-4$
$\frac{d^2}{dx^2}sin\left(x\right)+x$
$\frac{xy+wz}{\sqrt[3]{xy}-\sqrt[3]{xzwy}+\sqrt[3]{w^2z^2}}$
$\frac{2}{2z^2-z}$
$\frac{d}{dc}y=\frac{1}{2}y-250$
$\left(2x-m\right)\left(2x+m\right)$
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