$\lim_{x\to-3}\left(\frac{x^3+x^2-6x}{x^2-3x}\right)$

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

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

$\frac{30x^{6}z^{4}}{10x^{3}z}$

$\left(x+4\right)\left(x^2-7x+9\right)$

$\frac{\left(x-1\right)\left(x+1\right)}{x}$

$20y^22$