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1 November, 00:28

The sum 2n3 + 4n2 - 7 and - n3 + 8n - 9

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  1. 1 November, 00:51
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    (2n³ + 4n² - 7) + (-n³ + 8n - 9)

    (2n³ - n³) + 4n² + 8n + (-7 - 9)

    n³ + 4n² + 8n - 16
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