Question 204183
invert  and  multiply second  set  of  terms
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{(ab+b^2) / 4ab^5} * { (6a^2b^4)/(a+b) }
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factor
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{b(a+b) / 4ab^5} * { 6a^2b^4 / (a+b) }
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simplify  by  canceling  and  combining  like  terms
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(3/2) a
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check  by  letting, a=1,b=2 (arbitrary),,,both  original  and  answer = 1.5,,ok