$y=2px+p^2+x^2$

$\frac{d}{dx}\left(\frac{4}{u}+\frac{4}{u^2}\right)\left(2u+\frac{2}{u}\right)$

$a^3-4a^2$

$\frac{2x^3-6x^2+x-1}{2x^2+1}$

$3x\left(2x+4xy\right)$

$\frac{2+\cos\left(x\right)}{\sin\left(x\right)}$

$10y+7k-2y+3k$