Answer:
4x^3 + 29x^2 +40x +69
Explanation:
(4x³+29x² +39x + 63) + (x + 6)
4x³ + 29x² + 39x + 63 + x + 6
4x³+ 29x² +39x + x + 63 + 6
4x³+ 29x² + 40x + 69
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