$-[-2+7-\left(-7+\left(-7\right)+2\right)-1]$

$\left(x-2\right)\left(y-2\right)$

$\int\left(\frac{6x^3-5x^2}{2x^2-3x-2}\right)dx$

$\lim_{x\to0}\left(\frac{1}{2x}\right)^{\ln\left(1+x\right)}$

$\frac{3x+10}{x+7\:}<\:7$

$5m^4-2n^4-5m^4+3n^4$

$5^{-3}\cdot25^{-3}\cdot\left(5^{-1}\right)^{-3}$