$3x^2y^4\cdot\:2x^{-4}y^3$

$2\sqrt{36}$

$\lim_{x\to\pi}\left(\frac{6+6\cos\left(x\right)}{\left(x-\pi\right)^2}\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{\left(12x-6\pi\right)}{cos\left(2\pi\right)}\right)$

$4\left(2x\right)^3$

$\int\frac{3}{\left(2-x-x^2\right)}dx$

$x^{-9}-3\left(x^{-3}-10\right)$