$\int\left(\frac{\cos^2\left(x\right)-\sin^2\left(x\right)}{\cos^2\left(x\right)}\right)dx$

$\int\left(\csc\left(x\right)+1\right)\cdot\csc\left(x\right)dx$

$5xa-2yb+5-2xa-3yb+7xa-1yb+2$

$\lim_{x\to-3}\left(\frac{4x^3-x^2-36x+9}{x+3}\right)$

$2\left(8h\right)$

$-43+-27+1$

$5x-4\:para\:x=3$