$\int\frac{-y+e^{2y}}{e^y}dy$

$\left(x+2y+11\right)^2$

$2\csc^2=\frac{1}{\left(1+\cos\right)}+\frac{1}{\left(1+\cos\right)}$

$9\left(-2c\right)\left(3d\right)$

$\frac{dy}{dx}=\frac{x}{x+xy}$

$48\int_{-1}^{0.7}\left(0.7-x\right)\left(2\right)\sqrt{1-x^2}dx$

$cos\frac{x}{2}=-\frac{\sqrt{3}}{2}$