Thực hiện phép tính:

A=\(\left(\sqrt{2}+\sqrt{3}+\sqrt{5}\right).\left(\sqrt{2}+\sqrt{3}-\sqrt{5}\right).\left(\sqrt{2}-\sqrt{3}+\sqrt{5}\right).\left(-\sqrt{2}+\sqrt{3}+\sqrt{5}\right)\)

B=\(\sqrt{8-2\sqrt{15}}-\sqrt{23-4\sqrt{5}}\)

C=\(\left(\sqrt{3}-\sqrt{2}\right).\sqrt{5-2\sqrt{6}}\)

D=\(\sqrt{13+30\sqrt{2+\sqrt{9+4\sqrt{2}}}}\)

Thực hiện phép tính:

\(\frac{\sqrt{2+\sqrt{3}}}{2}:\left(\frac{\sqrt{2+\sqrt{3}}}{2}+\frac{2}{\sqrt{6}}+\frac{\sqrt{2+\sqrt{3}}}{2\sqrt{3}}\right)\)

\(\frac{\sqrt{3}+\sqrt{11+6\sqrt{2}}-\sqrt{5+2\sqrt{6}}}{\sqrt{2}+\sqrt{6+2\sqrt{5}}-\sqrt{7+2\sqrt{10}}}\)

Thực hiện phép tính:

\(\sqrt{3-\sqrt{5}}+\sqrt{3+\sqrt{5}}\)

\(\sqrt{21+6\sqrt{6}}+\sqrt{21-6\sqrt{6}}\)

\(\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10+2\sqrt{5}}}\)