$\int\:sec^2\left(3x+y\right)dx$

$6x^2-9x-18$

$\left(tan\left(a\right)+cot\left(a\right)\right)tan\left(a\right)=sec^2\left(a\right)$

$\int_{\frac{\pi\:}{2}}^{\frac{5\pi}{2}}\cos\left(x\right)dx$

$\int\frac{\left(z^3\right)}{\left(z-1\right)^3}dx$

$\lim_{x\to0}\left(\frac{4tan4\left(x\right)}{x}\right)$

$\int\left(x+7\right)^5\left(x+4\right)^{-7}dx$