$\frac{dy}{dx}=12x^3$
$\left(2x^{-5}-7\right)\left(2x^{-5}+7\right)$
$\frac{\sqrt{45}-\sqrt{20}}{\sqrt{5}}$
$\int\frac{x-7}{\left(x^2-10x-13\right)}dx$
$\int\sqrt{4+y}\cdot\left(y+1\right)^{2}dy$
$\left(ab^2\right)^{-1}$
$\int\:\frac{3x^2-4}{x^3-4x+2}dx$
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