$2cosec^2x+5cosecx-12=0$

$\int\frac{3-x^2}{\sqrt{25-x^2}}dx$

$4+3\left(-5+7\right)$

$\lim_{x\to0}\frac{\tan\left(5x\right)}{\tan\left(4x\right)}$

$\int\frac{1}{x\sqrt{x-12}}\:dx$

$6\left(5-2-1\right)+4\left(5-4-7\right)-5\left(-2\right)$

$\frac{dy}{dx}\left(\left(1+x\right)^{\frac{1}{x}}\right)$