$\int\frac{sin\left(8t+19\right)}{cos^2\left(8t+19\right)}dt$

$1-20\cdot\left(-2\right)$

$x^5-101x^3+100x$

$-14-1-1$

$\left(y\:-\:2\right)^2$

$\frac{1+tan^2\left(x\right)}{tan\left(x\right)}=sec\left(x\right)csc\left(x\right)$

$\left(\frac{x}{2\:}-1\right)\cdot\left(\frac{x}{2}+2\right)$