$\left(aw-wy\right)$

$sin\left(3x\right)\cdot\left(3x\cdot cos\:\left(3x\right)-sin\left(3x\right)\right)=0$

$\frac{dy}{dx}=-3x-4y+xy+12$

$3x^2-3xy$

$4y\frac{dy}{dx}=\frac{5x}{\sqrt{x^2+1}}$

$\int\left(4-cosx\right)^3sinxdx$

$\int_0^{0.2}2\pi\left(xe^{5x}+x\right)^2dx$