$sen^3\left(x\right)\left(1+cot^2\left(x\right)\right)-\left(1-cos^2\left(x\right)\right)\cdot csc\left(x\right)$

$9x^2-60x+25$

$-5<x:2-3$

$\lim_{x\to1}\left(\frac{4x^2lnx}{x^2-1}\right)$

$\frac{dy}{dx}=x^2-\frac{2}{3}y$

$\sqrt{6+9y^2}$

$\left(8x-5\right)\left(8x+5\right)$