$\left(x-1\right)\cdot\left(x^2+x+1\right)$

$\frac{\sin\left(4x\right)}{1+\cos\left(4x\right)}=\frac{\sqrt{3}}{3}$

$m+b=5$

$\left(-2a^2b^4-7a^4b^2\right)^2$

$\frac{1-z^3}{\left(1+\sqrt{2}\right)\left(1-\sqrt{z}\right)}$

$\int\frac{x^4}{\sqrt{4+x^2}}dx$

$\lim_{x\to\infty}\left(\frac{2x^3-2x^2}{x^3+2x^2}\right)$