$\int0^{\infty}\left(\frac{1}{e^x+e^{-x}}\right)dx$

$-216+104-90$

$\int sen^8\left(x\right)\cdot\cos^6\left(x\right)dx$

$\int xye^{\frac{x}{3}}dx$

$\frac{6\left(3\right)\left(-3\right)\left(3\right)-\left(-9\right)\left(3\right)\left(2\right)\left(3\right)}{-3\left(3\right)^2}$

$\int_0^{\infty}\left(\frac{\sec^2\left(x\right)}{1+\tan^2\left(x\right)}\right)dx$

$\left(-6wu^4\right)^2$