Add or subtract vertically.Subtract -x3y3 + x2y2 - x2y - 4x + 4 from 7x3y3 + 6x2y2 - x2y + xy2 + 4x + 2.
A. 8x3y3 + 7x2y2 - 2x2y + xy2 + 6
B. 8x3y3 + 7x2y2 + x2y + 8x - 2
C. 8x3y3 + 5x2y2 + 2xy2 - 2
D. 8x3y3 + 5x2y2 + xy2 + 8x - 2
Answer: D
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