$\frac{cot\left(x\right)}{csc\left(x\right)}-\frac{csc\left(x\right)}{cot\left(x\right)}=-\tan\left(x\right)sin$

$\csc^2\left(a\right)=\cos^2\left(a\right)$

$\left(5x\:-\:4\:+\:5x^3\right)^2$

$10=-6\cos\left(\frac{\pi}{2}x\right)+7$

$\int\frac{4}{\left(t+11\right)^7}dt$

$\int\frac{\left(2x+3\right)}{x^2-3x}dx$

$\frac{\sqrt{5x}+\sqrt{y}}{31}$