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if a2+b2=5ab prove that a3/b3+b3/a3=110
if a+b+c=abc then prove that a(b2c2-1)/bc+1 + b(c2a2-1)/ca+1 + c(a2b2-1)/ab+1=2abc
Chech the commutative property of multiplication for -7/3 and 4/9
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