$\frac{1}{\:5}\sqrt{5}x\:\frac{1}{2}\sqrt[3]{2}x\sqrt[6]{80}x\sqrt[3]{5}$

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

$\left(a^2b^2-ab\right)\left(a^2b^2+7\right)$

$42^2-23+72$

$\left(7a^2b^3-cd^5\right)\left(7a^2b^3+cd^5\right)$

$x^2+2y^2=c$

$\int_0^2\left(6e^{-5x}\right)dn$