$\int\frac{1}{x\left(x+2\right)\left(x-2\right)}dx$

$\frac{d}{dx}4^{x^9}$

$\int_{-ln\left(\sqrt{2}\right)}^0\left(e^r\sqrt{1-e^{2r}}\right)dr$

$15^4$

$\frac{500\sqrt{6}\pi}{9\pi}in^3$

$\frac{\csc^{2}\left(x\right)-1}{\sen^{2}\left(x\right)+\cos^{2}\left(x\right)}$

$2^{2}+2+1\sqrt{a^{3}-a^{2}-1a-1}$