$\frac{2x^3-6x^2+x-1^{-1}}{2x^2+1}$

$y=\frac{\left(x^2+3\right)^{\frac{2}{3}}\left(3x+2\right)^2}{\sqrt{x+1}}$

$\frac{9-x^2}{x+2}$

$x^2-11x-2\:$

$50\cdot50\cdot50\cdot50\cdot50\cdot50\cdot50\cdot50\cdot50\cdot50$

$4-18+5-32$

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