$9x^2-12x+3$

$\int_1^{\infty}\frac{1}{\left(x^2+1\right)^3}dx$

$\frac{d^2y}{dx^2}\left(\frac{8x^5}{5}-7x\right)$

$\frac{3x-4}{3-x}=2$

$\frac{dy}{dx}=\frac{\left(x+3\right)^5}{\left(2y+1\right)^4}$

$\left(\frac{x}{2}+2\right)\left(\frac{x}{2}+3\right)$

$2\left(3+3\right)$