$\frac{2}{\sec\:^2\left(x\right)}+\frac{\tan\:^2\left(x\right)}{\sec\:^2\left(x\right)}-1$

$\int\:xe^{\frac{1}{3}}dx$

$1x^2-24x+1c$

$\lim_{x\to0}\left(\frac{x^2-\sin\left(x^2\right)}{\sin^2\left(x\right)+2x\sin\left(x\right)\cos\left(x\right)}\right)$

$\left(d^3-d\right)y=e^x$

$\int\frac{cos\left(x\right)}{sen^5\left(x\right)}dx$

$\int\frac{x}{\sqrt{x^2-14x+33}}dx$