Algebra-1

Step 1: Distribute the parentheses.
(7a²b -3ab + 4) + (-a²b + 2ab - 5) is the same as 7a²b -3ab + 4 - a²b + 2ab - 5.

Step 2: Combine like terms.
Combine the terms with a²b: 7a²b - a²b = 6a

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