Add the following using vertical method.
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Step-by-step explanation:
1. -4h - 2h² + 2 + 4h³ - 6h² - 8
-4h - 2h² - 6h² + 2 - 8 + 4h³
-4h - 8h² - 6 + 4h³
2. x² - 2x + 12 + 13x - 14 + 4x²
x² + 4x² - 2x + 13x + 12 - 14
5x² + 11x - 2
3. 12x - 3y + 7 - 12y + 3x - 10
12x + 3x - 3y - 12y + 7 - 10
15x - 15y - 3
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