$\frac{-2\sqrt{3}}{2}$

$\lim_{x\to\infty}\left(\frac{\arctan\left(x^6\right)}{x^8}\right)$

$\int\left(\left(x+2\right)\left(x+1\right)^{\frac{1}{4}}\right)dx$

$\int\frac{\left(lnx\right)\sqrt{1+lnx}}{x}\:dx$

$2\:cos\:360\:-3\:tg\:135\:+\:cotg\:225$

$\frac{12}{x}+3;\:x=4$

$49x^2-98x+49$