Algebra
posted by Ike .
Can you solve this problem?
2a+b/(ab)(a2b)  a+4b/(ab)(a3b)  a7b/(a2b)(a3b)

Rewrite them with a common denominator of (ab)(a2b)(a3b) and combine terms in the numerator. You have not used parentheses in your numerators, but you need to use them to clarify what the numerators are.