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

$2+2+7y^{3}-6y^{3}+1-3y^{3}+y$

$\lim_{x\to-2}\:\:x^2-4\:\:x+2$

$\left(-a^2b^5c\right)\left(2a^2b^6c^3\right)$

$\int\left(2x^2+2x-1\right)\cos\left(3x\right)dx$

$\int_0^{\infty}\left(\frac{1}{\left(2x+1\right)}\right)dx$

$x^210x+4$