Rút gọn các biểu thức:
a) A=\(\frac{30}{\sqrt{6}+1}+\frac{2}{\sqrt{6}-2}-\frac{6}{3-\sqrt{6}}\)
b) B=\(\sqrt{17-6\sqrt{2}+\sqrt{9+4\sqrt{2}}}\)
c) C=\(\sqrt{8-2\sqrt{7}}-\sqrt{8+2\sqrt{7}}\)
d) D=\(\sqrt{a+1-2\sqrt{a}}-\sqrt{a+16-8\sqrt{a}}\) với \(1\le a\le16\)
e) E=\(\sqrt{a-1+2\sqrt{a-2}}+\sqrt{a-1-2\sqrt{a-2}}\)
f) F=\(\sqrt[3]{10+6\sqrt{3}}-\sqrt{3}\)
g) G=\(\sqrt[3]{7+5\sqrt{2}}+\sqrt[3]{7-5\sqrt{2}}\)