Answer:
^ means to the power of
1. 6x
2. 4x^3 - 2x^2 + 12x
3. -14x^4 should be -16^4
4. -5^2 + 2x
5. -15x^3 + 6x^2 + 18x
6. -5x^5 + 10x^4 - 5x^3
7. 8x^2 + 16x
8. -10x^6 + 40x^5 - 30^5
9. correct
10 5y^3 - 15y^2 +5y
11. -3x^3 + 4x^2
12. 7x^4 -7x^3
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