Answer
4$x^{2}$ + 8y + 6
Work Step by Step
3x + 7y + 4$x^{2}$ - 3x + 7 + y - 1
= 4$x^{2}$ + 3x - 3x + 7y + y + 7 - 1
= 4$x^{2}$ + 8y + 6
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