Answer:
B. 1. x^6
2. -6a^7
3. r^11
4. x^6
5.a^3b^6
6.x^14
7. 12y^8
8. 55x^4y^6
9. 30m^4n^4
10. 6a^10b^6c^16
C. 1. 40m+60n-810
2. 12am^2 - 8an- 16al^3+4ap
3. 2xmn-3ymn-4zmn
4. 20bx^2-8bx+20b
5. -28xa+4xb-14x
6. y^2 - 4
7. 4x^2 - 16
8. 16b^2 - 4
9. 25a^2-49
10. 9m^2-49
