$\left(2x-5y\right)\left(2x+2y\right)$
$1-cosx=2+cosx$
$\frac{dy}{dx}=\frac{xy+x}{e^{-2x}y}$
$\left(-8\right)\left(-5\right)+\left(4\right)\left(-3\right)$
$\int_0^{\pi}\frac{d}{4-3\cos}$
$7-\left|11+6\right|$
$-8m^5+4n^2-20n+8$
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