$ln\left(x+1\right)+\frac{2}{ln\left(x+1\right)}$

$\int\left(\frac{1}{\sqrt{x^2-289}}\right)dx$

$\left(x+3\right)\left(x-3\right)\left(x-2\right)\left(x+2\right)+13x^2-36$

$2.\left[-1\right]$

$15\cdot16$

$\int\:\frac{-2x+4}{\left(x^2-1\right)\left(x+1\right)}dx$

$2y^2+11y+18$