Answer with explanation is a must. Don t spam I'll report the answer
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6a³ - 2b² + 4c - 5 + 6a³ -5b² + 6c - 7
6a³ + 6a³ - 2b² - 5b² + 4c + 6c - 5 - 7 ( grouping like terms together)
12a³ - 7b² + 10c - 12
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u just need to add but must be careful with the signs.
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