$\frac{4x^5-30x^3-50x}{x+3}$

$\int\left(\frac{3x^2-8x+13}{\left(x+2\right)\cdot\:\left(x-1\right)^2}\:\right)$

$\lim_{h\to\infty}\frac{h^2-h-6}{h^3-3h^2+h-3}$

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

$\left(3+2\right)-\left(-12\right)$

$\int\frac{4x^2+12x+30}{\left(x+5\right)\left(x-2\right)\left(x+3\right)}dx$

$\lim_{x\to6}\left(2x-3\right)\left(4x+15\right)$