$\frac{d}{dx}\left(z-e^x\sin\left(y-z\right)\right)$
$\frac{x^2+x}{6x^2+8x}$
$45\cdot2+45\cdot2+15\cdot2+45\cdot2+5\cdot2+11\cdot2$
$4x^2-6x-4\:$
$7x+7x^2-2x^2-8+8+8x$
$v^3-27$
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