$10\left(2+\sqrt{3}\right)$10\left(2+\sqrt{3}\right)

$\displaystyle \frac{10}{\sqrt{3}-2}$\displaystyle \frac{10}{\sqrt{3}-2}

$10\left(\sqrt{3}-2\right)$10\left(\sqrt{3}-2\right)

$\displaystyle \frac{\sqrt{3}+10}{2}$\displaystyle \frac{\sqrt{3}+10}{2}