$\left(2x+3\right)^2-\left(2x-3\right)^2+\left(3x-4\right)^2-8x^2+16$

$4x^3-5x^2+10x+5\cdot6x^2-3x+5$

$\frac{\csc\left(a\right)}{\tan\left(a\right)+\cot\left(a\right)}=\cos\left(a\right)$

$-12\left(v^3\right)^{-2}\cdot3\left(h^4\right)^3$

$3xy^2\frac{dy}{dx}=6x^2y+3y^3$

$\frac{n^{24}}{27}+125y^{33}$

$\frac{dy}{dx}\left(\frac{2}{\left(5x+1\right)^3}\right)$