$\frac{1}{1-x^5}$

$\left(\frac{cos\left(u\right)}{csc\left(u\right)}\right)\left(\frac{u}{1}\right)$

$\int xsin\left(\frac{1}{x}\right)dx$

$4+-75$

$\int_{-1}^2\left(4+2x\right)dx$

$\lim_{x\to\infty}\left(\frac{8x^4+5x-7}{x^3+2x}\right)$

$\sqrt{81}\::\:\left(-3\right)^2$