$g\left(x\right)=3\left(9^{x+1}\right)$

$y\:=\:\ln\left(x^2-x-20\right)$

$25x^2-5x$

$\frac{1}{12}\left(6.1721\right)$

$\lim_{x\to\infty}\left(\frac{sin\left(\frac{\pi}{2}x\right)}{x}\right)$

$\int\left(-\csc\left(x\right)\right)dx$

$\left(-32\right)-\left(+9\right)-\left(-17\right)-\left(+28\right)$