(64)^1/2/(49)^1/2/(7^3)^1/2/(125)^1/2×(√8)^2
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(64)^1/2/(49)^1/2/(7^3)^1/2/(125)^1/2×(√8)²
(8²)^1/2/(7^2)^1/2/(7.7²)^1/2/(5.5²)^1/2×(8^1/2)^2
(8)/(7)/(7√7)/(5√5)×8
8 × 1/7 × 1/7√7 × 1/5√5 ×8=64/(49×25√35)
=64/1225√35
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