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Positive numbers aaa, bbb, ccc, xxx, yyy and zzz satisfy abc=125,ax=by=cx=511.abc=125, a^x=b^y=c^x=5 ^{11}.abc=125,ax=by=cx=511. What is the value of xy+yz+zxxyz?\frac{xy+yz+zx}{xyz}?xyzxy+yz+zx?
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