$\tan^2\left(x\right)\left(-1-\cos\left(2x\right)\right)=\cos\left(2x\right)-1$
$-1-2y$
$\frac{\left(e^x\right)^3}{\left(e^{2x}\right)^e}$
$-755\cdot\left(3-6\right)$
$\frac{dy}{dx}\left(x^2y-y^2=6\right)$
$\cos\:\left(2x-3y\right)\cos\:\left(x-y\right)$
$\left(x-y\right)\left(z-1\right)$
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