when 3a squared minus 7a plus 6 is subtracted from 4 a squared minus 3a plus 4 is?

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"when 3a squared minus 7a plus 6 is subtracted from 4 a squared minus 3a plus 4 is"

4a^2 - 3a + 4 -(3a^2 - 7a + 6)
= 4a^2 - 3a + 4 - 3a^2 + 7a - 6
= a^2 + 4a -2