$u\:2\:-\:4u\:-\:60$

$\left(a+3\right)\left(a-5\right)+\left(a+1\right)^3+\left(a+1\right)^3-\left(a+1\right)\left(a^2-a+1\right)$

$a\left(1+b\right)-3\left(1+b\right)+b\left(1+b\right)$

$\int\frac{4x^2-5x+4}{\left(x-3\right)\left(x+3\right)}dx$

$\int33x^{-34}dx$

$\left(\frac{2}{3}x-2\right)^2$

$\left(xz^2-y^3\right)^3$