Answer:
Ok I'm totally sure this is off but I seem to be tho only answer here so...
Explanation:
7. 8x4y^7 z^2
8. 11x^4 y^3
9. x^9
10. x^7 +2^6
11. x^5 +2x^4 +5x^3
12. x^6 +3x^5 +2x^4 +11x^3 +4x^2
13. 4x^5 y+4x^2 y^3 +12x^3 y^2
14. 6x^4 y+3x5y^2
15. 6x^5 y^2 +18x^4 y^3+18x^2 y^5
16. 11x^6 y^3 +33x^5 y^5 +44x^4 y^4 +88x^3 y^4 +12x^5 y^3