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= 5p² - 3p² + 2p + 7p - 5 - 4
= 2p² + 9p - 9
= 5p^2 + 2p - 5 - 3p^2 + 7p - 4
= 5p^2 - 3p^2 + 2p + 7p - 5 - 4
= 2p^2 + 9p - 9
^ = pangkat
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