$\frac{dy}{dx}=\frac{y}{2x+3y}$

$a+b.3=a+3b$

$x^2-\frac{2x}{5}$

$\int^3\sqrt{20+3x^3}\left(x^2\right)dx$

$\left(\frac{x^2}{4}+\frac{xy\sin\left(\frac{y}{x}\right)}{4}\right)\frac{dy}{dx}=\frac{y^2\sin\left(\frac{y}{x}\right)}{4}$

$\int\left(\sqrt{1+y^2}y\right)dy$

$\frac{dy}{dx}=\frac{-y^2\sin\left(x\right)}{\cos^2\left(x\right)}$