Answer
1. 3m
2. 12a
3. -8^2
4.-5x^2y^2
5. 12a-7b
6. -3a^2
7. -xyz^2
8. 9pq-10p-27q
9. 14y
10. 17a-17b
11. 13/12a
12. -a^2b+ 5/6ab^2
13. 11/12m
14. 21/10a - 7/10b
15. -5p+9/4q
16. -3a^4 + 4a^3 - a^2
17. 0.27m - 2.05n
18. 1.8x^2y- 0.6xy^2
19. -0.089a
8.8m questions
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