$\frac{\left(x+y\right)^6-6\left(x^6+y^6\right)}{\left(xy\right)^3}$

$\frac{3}{x+4}.\frac{x}{x+5}$

$\sqrt[3]{2x}\cdot\sqrt[3]{xy}\cdot\sqrt[6]{x^6y^9}$

$\int6\tan^{-1}\left(\frac{8}{x}\right)dx$

$\left(x+8\right)\left(x^2+3x-9\right)$

$\left(4x^3+5\right)\cdot\left(2x-5\right)$

$10-5+10-4-3+2-9+6$