$4cotx+2=-2$

$\frac{cscx-sinx}{sinx}$

$\left(a\:+1\right)^2\:-\:\left(a\:-1\right)^2\:\:$

$\frac{dy}{dt}=\left(y-2\right)\left(y-1\right)$

$\left(a+4c\right)\left(a-4c\right)$

$\left(-3\right)^2\cdot\left(-2\right)^2\cdot\left(-1\right)^2$

$\int\frac{r^{-\frac{1}{2}}}{\left(6+\sqrt{r}\right)^5}dr$