Answer:
All below
Step-by-step explanation: Can I get brainliest? Thanks!
1. 6x^3
2. 152x^8
3. 18x^10
4. 6x^5
5. 21x^3y^4
6. 30x^2y^4z^4
7. 32xy^7z^2
8. 11x^4y^3
9. x^5+x^4