Posted by **Bob** on Wednesday, May 9, 2012 at 11:42pm.

How to rewrite an expression with negative exponents such as :

-12(3x-1)^-5 *(6x+7)^5 + 30(3x-1)^-4 *(6x+7)^4

common factor is 6 but what can I pull out from the (3x-1)^-5 and (3x-1)^-4 ?

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