$\int\frac{x^3+3x}{x^4-2+7x^2}dx$

$4n^4-12n^2+9$

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

$\sin\left(x\right)+\cot\left(x\right)\cdot\sin\left(x\right)-\cos\left(x\right)$

$2^3-6\cdot2^2+11\cdot2-6$

$-\frac{72}{4}+\left(-5\right)-\left(-4\right)$

$\int\frac{-14}{\left(2x+3\right)\left(x-2\right)}dx$