\[\sqrt{34} - \sqrt{6}\ \ и\ \ \ \sqrt{33} - \sqrt{7}\ \]
\[\left( \sqrt{34} - \sqrt{6} \right)^{2} =\]
\[= 34 - 2\sqrt{204} + 6 =\]
\[= 40 - 2\sqrt{204}\]
\[\left( \sqrt{33} - \sqrt{7} \right)^{2} =\]
\[= 33 - 2\sqrt{231} + 7 =\]
\[= 40 - 2\sqrt{231}\]
\[40 - 2\sqrt{204} > 40 - 2\sqrt{231}\]
\[\Longrightarrow \sqrt{34} - \sqrt{6} > \sqrt{33} - \sqrt{7}.\]