$\int\frac{x^3-1}{x^3}dx$

$\lim_{x\to1}\left(\frac{x+1}{x^2+5x-6}\right)$

$\left(+363\right):\left(-3\right)$

$\int\left(x^2+2\right)\left(2x-1\right)dx$

$\frac{dy}{dx}=-\frac{x^2}{y^2}$

$3 x ^ { 5 } - 2 x ^ { 2 } + 9 x ^ { 4 } - 5 x + 3$

$\int_5^{\infty}\left(8ne^{\left(-n^2\right)}\right)dx$