answer it step by step plzz
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( ab + 1) ^m / b^m. × ( ba -1)^ n)/ b^n )/ ( ab +1)^m / a^m × ( ba -1)^n / a^n
= a^m a^n / b^ m b^n
= a^( m+n)/ b^ ( m+ n)
= ( a/b)^ ( m+n)
= a^m a^n / b^ m b^n
= a^( m+n)/ b^ ( m+ n)
= ( a/b)^ ( m+n)
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