$2\left(7v-8\right)+6\left(4v+6\right)$

$\frac{1.7}{10}$

$35\left\{4+3\left[6+\left(7+8+3\left[+4\left[4+3\:\left(2+5\right)\right]\right]\right)\right]\right\}$

$\lim_{x\to0}\left(\frac{\sqrt{5+x}-\sqrt{5}}{x+\sqrt[3]{1-x^3}}\right)$

$f\left(t\right)=\frac{2}{\sqrt{t}}+\frac{6}{\sqrt[3]{t}}$

$e^{2ln\left(20+t\right)}$

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