please tell me the answer step by step urgent
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Answer:
1x² - 8x³ - 7y³ - z³
Step-by-step explanation:
a) 5x² - x³ + y³ - 6x² + 2x² - z³ - 8y³ + 7x³
5x² - 6x² + 2x² - x³ + 7x³ + y³ - 8y³ - z³
( -1x² + 2x²) - 8x³ - 7y³ - z³
1x² - 8x³ - 7y³ - z³
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