Tính
a) \(\left(\sqrt{8}+\sqrt{72}-\sqrt{2}\right).\sqrt{2}\)
b) \(\left(\sqrt{5}+\sqrt{2}+1\right).\left(\sqrt{5}-1\right)\)
c) \(\left(\sqrt{4+\sqrt{7}}-\sqrt{4-\sqrt{7}}\right)^2\)
d) \(\left(\sqrt{2}+1+\sqrt{3}\right).\left(\sqrt{2}+1-\sqrt{3}\right)\)
e)\(\left(\sqrt{\frac{9}{2}}+\sqrt{\frac{1}{2}}-\sqrt{2}\right).\sqrt{2}\)
f) \(\left(5\sqrt{3}+3\sqrt{5}\right):\sqrt{15}\)