\(\sqrt{21 - 8\sqrt{5}}\)

\(4 - \sqrt{5}\)

\(\sqrt{16 - 6\sqrt{7}}\)

\(3 - \sqrt{7}\)

\(\sqrt{39 + 12\sqrt{3}}\)

\(6 + \sqrt{3}\)

\(\sqrt{3 - 2\sqrt{2}}\)

\(\sqrt{2} - 1\)

\(\sqrt{9 - 4\sqrt{5}}\)

\(\sqrt{5} - 2\)

\(\sqrt{66 - 24\sqrt{6}}\)

\(4\sqrt{3} - 3\sqrt{2}\)