$\left(x+2\:\right)y^2\:\:\:\:\:\:\:$

$\left(\frac{\left(x+1\right)^6}{6}\right)-\left(\frac{2\left(x+1\right)^5}{5}\right)+\frac{\left(x+1\right)^4}{4}$

$\frac{16y^7-24y^5}{8y^2}$

$2r^2\:-\:2r^2$

$log\left(z\right)=2,3$

$5a^7-5a^4b^3$

$\left(a^{-3}+a\right)\left(a^{-3}+7a\right)$