$\frac{120ab}{-12b^2}$

$\frac{1}{\left(x+n\right)^2-1}-\frac{1}{x^2-1}$

$2\cot\left(x\right)^2+2=7+3\cot\left(x\right)$

$\frac{dy}{dx}\left(y=e^{\sin\left(3x\right)}\right)$

$12-36-8+15-19-20-36+2-1$

$3\sin\left(x\right)\tan\left(x\right)=\tan\left(x\right)$

$\frac{dy}{dx}=2\left(3x+5\right)^3$