$-4x^2y^2+4x^1y^2$

$\int\:\frac{x^2\:-\:1}{x^2\left(x\:-\:2\right)^3}dx$

$\frac{2}{5}+\frac{1}{6}x+\frac{3}{2}x^2-\frac{1}{5}+\frac{3}{6}x-\frac{1}{2}x^2$

$7pq^3+48p^3q^2+5p^3q^2$

$\left(-3\cdot7\right)+\frac{10}{5}$

$\left(a-12\right)\left(a+12\right)$

$\lim_{x\to1}\left(2x^3-1\right)\cdot\left(2x^3+1\right)$