a^3 -3a^2 +4a +6 from 2a^3 +5a^2 +7
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Answer:
2a³+5a²+7-(a³-3a²+4a+6)
2a³-5a²+7-a³+3a²-4a-6
2a³-a³+3a²-5a²-4a+7-6
a³-2a²-4a+1
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