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

$\frac{x^4-2x^3-3x^2+4}{x-3}$

$-2.6+-3.4+-6.9$

$\left(121-x^2\right)\left(11-x\right)$

$\lim_{x\to\infty}\left(x\:sin\left(\frac{8\pi}{x}\right)\right)$

$\int_2^6r\left(t\right)dt$

$\tan\left(\frac{\sqrt{10}}{6}+\frac{\sqrt{5}}{4}\right)$