$-\:\left(\left(\:x\:+\:y\:+\:z\:\right)\:-\left(\:x\:-\:2y\:\right)\right)\:-\:\left(\:15y\:+\:16z\:-\:12x\:\right)\:$

$\int\frac{2x^3+x-1}{x^2-5x}dx$

$\frac { ( 3 x + 2 ) ^ { 2 } } { 4 }$

$\int_{-1}^0\left(\frac{1}{x^2+2x+1}\right)dx$

$\frac{d^3}{dx^3}\left(2x^4-3x^{-3}+4x^2+5x\right)$

$\left(4x^3-6x+5\right)\left(-3x^2+2x\right)$

$\frac{5x^4y^7z^5y^2x^4}{x^2y}$