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

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

$\left(xy^2\right)^3.\left(-5x^2y^3\right)^2$

$\frac{7}{\sqrt{7}}$

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

$tan\left(x-y\right)=\frac{a-b}{a+b}\:$

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