$\frac{1-\sin\left(x\right)}{\cos\left(x\right)}^2$
$2w^2+2w-4$
$\frac{dy}{dx}\left(e^{2xy}=sin\left(y^5\right)\right)$
$\left(4x-\frac{9y}{2}+7.5\right)\left(4x-\frac{9y}{2}+7.5\right)$
$13n=39$
$\sqrt{2px}$
$2w-6-3w$
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