$\int\frac{2\sqrt{x^2-\frac{1}{4}}}{x}dx$

$\int4^{10x}dx$

$-177\left(5\right)$

$\lim_{x\to0}\left(\frac{\arctan\left(x\right)}{\ln\left(x\right)}\right)$

$2\cos\left(x-1\right)=0$

$\lim_{x\to5}\left(\frac{\sqrt{x-4}-3}{x-5}\right)$

$\left(x+7\right)\left(x+4\right)$