$\sin^2\left(x\right)+\sin^2\left(x\right).\cot^2\left(x\right)+\cos^2\left(x\right)+\cos^2\left(x\right).\cot^2\left(x\right)$

$\sqrt[3]{\sqrt{2^{18}\cdot3^{12}\cdot\left(-4\right)^{12}}}$

$2xe^{-x}-x^2e^{-x}$

$\frac{d}{dx}\frac{x^3+\sqrt{x}}{x^3}$

$-75\cdot0$

$-5\left(u-8\right)$

$\frac{y'}{-5x-2x^2+7}=\frac{4x^3}{y^2}$