$\int9tan\left(x\right)sec^2\left(x\right)dx$

$-3\sqrt{3}+2\sqrt{3}-\sqrt{3}$

$16\sqrt{\frac{\sqrt{65}-7}{2\sqrt{65}}}+16\sqrt{\frac{\sqrt{65}+7}{2\sqrt{65}}}$

$3\cdot10-1$

$\int\frac{6x^5+4}{\left(x^6+4x\right)^2}dx$

$x^2-x+8x+2x^2$

$\int\left(\frac{30}{\left(x-2\right)^6}\right)dx$