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

$\left(\frac{5x}{6}+\frac{1}{3}\right)\left(6\right)$

$\int\left(1-tan\left(3x\right)\right)^2dx$

$\sqrt[5]{\left(a+b\right)^3}$

$225-30a+a^2$

$8x^{3\left(2x^2+8xy+6y^2\right)}$

$\left(7\:-4\:+\:5\:-9\right).\left(6\:-5\:+2\right)$