\[\boxed{\mathbf{1254}\mathbf{.}}\]
\[1)\ 3\sqrt{\frac{5}{9}} - \frac{1}{2}\sqrt{20} + 3\sqrt{180} - 4\sqrt{\frac{125}{4}} =\]
\[= \sqrt{5} - \sqrt{5} + 18\sqrt{5} - 10\sqrt{5} = 8\sqrt{5}\]
\[2)\ \frac{1}{\sqrt{6} - \sqrt{5}} - \frac{3}{\sqrt{5} + \sqrt{2}} - \frac{4}{\sqrt{6} - \sqrt{2}} =\]