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OpenStudy (anonymous):
3. What is the sum or difference? 4x^10 - 9x^10 A) -5x^10 B) -5x^20 C) -36x^10 D) -36x^20 4. What is the sum or difference? 7t^5 - 10t^5 A) -17t^5 B) -70t^5 C) -3t^5 D) -3t^10
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