$\frac{dy}{dx}=7y^{-2}$
$8,25\:-10$
$\frac{w}{-3}\:+11=8$
$2x^2\left(3x^2-2x\right)-3x\left(x^3-3x^2\right)$
$\frac{tanx}{sin\left(-x\right)}$
$\frac{d}{dx}\left(x^2-2y^3+4xy=3\right)$
$12mn+8n-3n-2$
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