\(\frac{2-\sqrt{3}}{1+\sqrt{4+2\sqrt{3}}}+\frac{2+\sqrt{3}}{1-\sqrt{4-2\sqrt{3}}}=\frac{2-\sqrt{3}}{1+\sqrt{3+2\sqrt{3}+1}}+\frac{2+\sqrt{3}}{1-\sqrt{3-2\sqrt{3}+1}}\)
\(=\frac{2-\sqrt{3}}{1+\sqrt{3}+1}+\frac{2+\sqrt{3}}{1-\sqrt{3}+1}\)
\(=\frac{2-\sqrt{3}}{2+\sqrt{3}}-\frac{2+\sqrt{3}}{\sqrt{3}}\)
\(=\frac{18-14\sqrt{3}}{3}\)