please answer the above question
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6a^2-4a+9-(a^2-2a+1+3a^2+-5a+3)
6a^2-4a+9-(4a^2-7a+4)
2a^2+3a+5
6a^2-4a+9-(4a^2-7a+4)
2a^2+3a+5
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