$\lim\:_{x\to\:4\:}\left(\frac{3\sqrt{x}-x}{3-\sqrt{x}}\right)$

$4\int x^4\:dx$

$\lim_{x,y\to0}\left(\arctan\left(\frac{3xy-2}{x^2+y^2}\right)\right)$

$\left(9x-11y+8\right)^2$

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

$\left(\frac{1}{4}\right)\left(0.25\right)$

$\tan^{-1}\left(-3\right)$