\(\sqrt{0}=0\)

\(\sqrt{9}=3\)

\(\sqrt{225}=15\)

\(\sqrt{36}-\sqrt{4}=6-2=4\)

\(10\sqrt{144}-11\sqrt{16}=10⋅12-11⋅4=76\)

\(\sqrt{9}⋅\sqrt{4}=3⋅2=6\)

\((8\sqrt{5})^2=8^2⋅\sqrt{5}^2=64⋅5=320\text{.}\)

\((7\sqrt{2}-5)(7\sqrt{2}+5)=(7\sqrt{2})^2-5^2=49⋅2-25=98-25=73\text{.}\)

\((\sqrt{5})^2=5\text{.}\)

\(-5(\sqrt{2})^2=-5⋅2=-10\text{.}\)

\(\sqrt{6}+4\sqrt{6}=5\sqrt{6}\)

\(2\sqrt{3}⋅3\sqrt{5}=6\sqrt{15}\)

\({\sqrt{56} \over \sqrt{8}}=\sqrt{7}\)

\({54\sqrt{10} \over 6\sqrt{2}}={54 \over 6}⋅{\sqrt{10} \over \sqrt{2}}=9\sqrt{5}\)

\({30\sqrt{28} \over 5\sqrt{7}}={30 \over 5}⋅{\sqrt{28} \over \sqrt{7}}=6⋅\sqrt{4}=6⋅2=12\)