$x^2-2x+17$

$36\:x\:9$

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

$5^2-2\left(5\right)\left(2\right)+2^2+2\left(5\right)\left(2\right)-2^2+2^2$

$\left(3x^3+7x-2\right)\left(2xy^2\right)$

$\frac{1}{3}\left[18\ln\left(x+6\right)+\ln\left(x\right)-\ln\left(x^3\right)\right]$

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