$\frac{15a+20ab}{-5a}$

$\left(2x+y\right)-\left(x+6y\right)\frac{dy}{dx}=0$

$6\cdot3\:\left(3\cdot4-5\cdot3+7\right)\:$

$\left(\frac{1}{2}p-\frac{2}{3}q\right)\left(\frac{3}{4}p-\frac{1}{2}q\right)$

$\frac{dy}{dx}=-3y+9$

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

$\int_{\sqrt{2}}^1\left(\frac{1}{\left(x+1\right)\left(\sqrt{x^2+2x}\right)}\right)dx$