[tex](\frac{6}{2\sqrt{3}-\sqrt{6} } -\sqrt{12}+1)-(\frac{3}{\sqrt{6}+\sqrt{3} } +\sqrt{3}-1)=\\ (\frac{6}{2\sqrt{3}-\sqrt{6} } -2\sqrt{3} +1)-(\sqrt{6} - \sqrt{3} + \sqrt{3} - 1) =\\(\frac{6}{2\sqrt{3}-\sqrt{6} } -2\sqrt{3} +1)-(\sqrt{6} - 1) = \\\frac{6}{2\sqrt{3}-\sqrt{6} } -2\sqrt{3} +1 - \sqrt{6} + 1 =\\2\sqrt{3} + \sqrt{6} - 2\sqrt{3} +1 - \sqrt{6} + 1=\\2[/tex]
