August 2018 1 16 Report
1. (-3m+4n-6) + (7n-8m+10) =
2. (15a+7b-5c) + (-11a-12b+13d) =
3. (-3m+4n-5) - (7n-9m+10) =
4. (15a+7b-5c) - (-11a-10b+10c) =
5. (13a-8b) + (12a+9b) =
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