$\left(3a^2-2a+4\right)\left(3a^2-a\right)$

$\int\frac{2}{2\sqrt{1+e^{2x}}}dx$

$\frac{a^3+b^3}{\left(a+b\right)^2-3ab}-a$

$\left(1+\left(\frac{x}{n}\right)\right)^{3n}$

$\frac{d}{dx}\left(x^6+x^4\right)^{lnx}$

$\left(6y^2+1\right)\left(6y^2-8\right)$

$2\:-2^2\:\:-1\:3\:-\:3-2\:3\:-\:\left[-5-1\:3\:-\:\left(3\:-1^3\:\:+\:2\:-4\:-1^2\:\right)\right]\:$