$\frac{-u+1}{-u-1}$

$\frac{d}{dx}\left(y\:=\:\left(sin\left(3x\right)\right)^{ln\left(x\right)}\right)$

$\int e^{3x}\sin\left(-5x\right)dx$

$\frac{x^3+8x^2+17x+136}{8x^2+136}$

$-\frac{1}{3}n=3$

$-x^2+6x+7=0$

$\frac{\left(x^{2\:}+2\right)}{x^2}\:\frac{dy}{dx\:}\:=\:\frac{1}{y^2}$