Simplify:

Simplify each expression: 1. a ∙ a ∙ a. 2. y2 ∙ y ∙ y3 ∙ y 3. 2c2 ∙ c 4. b2 ∙ b3 5. ... 3c3d-4 12. 3x-5. 4y-2z-1. 13. x-2x5 14. a3a-6 15. n-4n-2 16. y-3y0. 17. x4. x-2 18. a-3. a2 19. 6n-2. 8n-6 20. ... 4) 1. The expression is equivalent to. 1) x0 2) 2 3) x2 4) -2x4. 2. Which expression is equivalent to ... ................
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