$-\left(5r+8\right)=-2-5r$

$y'=\frac{\left(x^2+1\right)y}{x-x\cdot\:\:y^2}$

$\frac{x^2-4x+6}{x-2}$

$\frac{70}{-10}$

$\cot\left(x\right)\tan\left(x\right)\csc\left(x\right)=\frac{1}{\sin\left(x\right)}$

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

$5yxdy-2\ln\left(x\right)dx=0$