$9\sqrt{9}$

$\sqrt{81}$

$\sqrt{68}$

$8.888888...$

$(\sqrt{2})^2$

$2\sqrt{2}$

$\frac{\sqrt{4}}{2}$

$2.5$

$\frac{7}{11}$

$\sqrt{121}$

$0.121$

$2\pi$

$\sqrt{100}$

$\sqrt{1000}$

$0.2222222....$

$0.00001$

$\frac{2}{\sqrt{5}}$

$-\sqrt{64}$

$\frac{2}{\sqrt{25}}$

$-13$

$\frac{1}{5}$

$-\sqrt{36}$

$\sqrt{7}$

$\frac{22}{7}$

$\frac{1}{4}$

$\frac{\sqrt{4}}{4}$

$\frac{\pi}{4}$

$4$

$\pi^2$

$2^2$

$\frac{2}{2}$

$-5.6$

$\sqrt{7}2\sqrt{7}2$

$\sqrt{72}$

$0.72727272....$

$0.72$

$-\sqrt{100}$

$-\sqrt{99}$

$\frac{99}{1000}$

$-3\frac{99}{100}$