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

$3x^2-5x-4=0$

$\frac{3x^3-2x^2-12x+4}{x-2}$

$\left(x+1\right)\cdot\frac{dy}{dx}+2\cdot y=\frac{e^x}{x+1}$

$\frac{1}{\left(x+1\right)\left(x-2\right)}$

$\lim_{w\to+\infty}\frac{w^3}{w+1}-\frac{w^2+2}{w-1}$

$\frac{9999}{0}$