$\frac{d}{dx}\left(y\right)\left(\frac{1}{\frac{1}{\sqrt{y}}+5}\right)$

$-10-\left(-3\right)+2-\left(+30\right)$

$\lim_{n\to\infty}\left(\frac{2n^2+2}{n^4+4n+1}\right)$

$\lim_{x\to2}\left(\sqrt{x^2+3x-1}\right)$

$\frac{10}{3\sqrt{7}}=\frac{a\sqrt{7}}{b}$

$\frac{d}{dx}\ln\left(6x^2+1\right)$

$\frac{dy}{dx}=1-\left(\frac{y}{x}\right)$