$\frac{x^3-5x^2}{x}$

$\frac{d^2}{dx^2}\left(x^3\:+\:5xy^2\:+\:2y^3\right)$

$\int\frac{4x^3}{\left(7x^4-3\right)^2}\:dx$

$5xy-3y+2x-y+4x-5xy$

$y^2\left(3y-\frac{2}{3}\right)$

$\sec^2x=\frac{1-\cos\left(2x\right)}{2}$

$\lim_{x\to-1}\left(\frac{x^2+3x+2}{sin\left(x+1\right)}\right)$