Subtract the following:
8. -7ab from 12ab.
9. 2x4 - 5x3 + 2x2 - 5x + 6 from 4x3 - 8x2 + 2x - 7
10. 8p2 +6q? - 7r2 + 8 from 9p2 - 3q2-7r2 +6.
1. 2-a-a? from 4a² + 2a -7.
12. 6x3 + 8x2 - 6x + 9 from 9x3 - x2 + 2x + 4.
13. -9ab +262 +2c-9 from 9ab - 3c +262 - 7.
14. 3m- 3+ 6m from m? -9.
15. From 9x°- 5x + 3x2 - 8 take away 6+ 7x² + 5x + 2x 3.
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