$4x^3+20x^2-8x$

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

$\sin\left(x\right)=\frac{\cos\left(x\right).\sin\left(x\right)}{\cot\left(x\right)}$

$3f+1=10$

$4\left(5c+3\right)$

$xdy-\left(2xe^x-y+6x^2\right)dx=0$

$\left(\sqrt{27}\sqrt{x}+\sqrt{20}\sqrt{y}\right)\left(\sqrt{27}\sqrt{x}-\sqrt{20}\sqrt{y}\right)$