$\left(1-cos^2q\right)\left(1+tan^2q\right)=tan^2q$

$\lim_{x\to6}\left(\frac{x^2+x-42}{x-6}\right)$

$\int_2^{\infty}\left(\frac{1}{x^2+x-2}\right)dx$

$\left(x^2y-4y\right)^2$

$\int35tan^5\left(x\right)sec^4\left(x\right)dx$

$-19+1+-24+-18+-17$