$\int\frac{6}{x^2\sqrt{4+x^2}}dx$

$\frac{dy}{dx}=8\left(x^2-1\right)$

$\left(-x+5\right)\cdot\left(-9x-54+\frac{270}{-x+5}\right)$

$\frac{dy}{dx}=\frac{y}{e^{-x}}$

$\int_1^7\left(-2x\right)dx$

$\int_{-1}^1-12xdx$

$\left(\frac{1}{y^{-1}\left(y^2\right)}\right)^{\frac{3}{4}}$