$\lim_{n\to\infty}\left(\frac{6n^3+n^2-n}{3n^3+n+10n^2}\right)$

$\lim_{x\to125}\left(\frac{x^{\frac{5}{3}}-2x-2875}{x^{\frac{1}{3}}-5}\right)$

$log\left(6x+6\right)-log\left(3x-2\right)=log3$

$arctan\left(tan\left(\frac{25\pi}{3}\right)\right)$

$\frac{dy}{dx}=\left(5-x^2\right)\cdot\left(1-3x\right)$

$cos\left(130\right)cos\left(10\right)+sin\left(130\right)sin\left(10\right)=0$

$\int_0^1\left(\frac{4}{2x^2+5}\right)dx$