Question 187678
Simplify.
5w^9 z^7* 3w^-2 z^-4 x^5 * 4x^-5 
----
(5*3*1*1*4)*(w^9*w^-2)*(z^7*z^-4)*(x^5*x^-5)

= 60 w^7 z^3 

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Cheers,
Stan H.