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OpenStudy (anonymous):
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OpenStudy (anonymous):
Simplify each expression. 15. (5x)^2 16. (-3v^2)(-3v) 17. (4c^2)^3 18. (8m^2)(7m^5) 19. (9b^3)^2 20. (-6pq)^2 21. 7(n^2)^2 22. (-5t^4)^3
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