Answer:
1. x^15
2. y^13
3. 8x^6
4. w^18
5. a^7b^14
6. 25p^6y^2q^4
7. -32n^15
8. 81a^12b^8c^4
9. m^7
10. -1
11. 1/n^9
12. t^6
13. 2x^3
14. 2x^14
15. x^12/y^9
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Apologies if wrong.
