4a - 7ab + 3b +12 from 12a - 9ab + 5b - 3
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4a - 7ab + 3b +12 from 12a - 9ab + 5b - 3
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Answer:
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Answer:
12a+4a-9ab-7ab+5b+3b-3+12
16a-16ab+8b-15