$12y^2+4y^2+15y^3+33y^3$

$\int\frac{x^2}{\sqrt{4x^2-9}}dx$

$\frac{12x+7}{x^2-x-2}$

$\int\sqrt[3]{3-4x^2}\left(-8x\right)\:dt$

$2y\left(3x^2+y^2\right)$

$\frac{d}{dx}\left(3y^4\:-\:5x^{3\:}y^4=2xy-x^4\right)$

$\lim_{x\to\infty}\left(\frac{\log\left(e^x-x\right)+x}{3x}\right)$