find the sum for each set of polynomials make sure ur answer is simplified
show your solution

1. (3x² + 4x – 7) + (6x² – 6x + 2)
2. (8x² - 1) + (4x² - 3x + 5)
3. (4x² + 5x – 4) + (5x2 – 6x + 3)
4. (-2x² – x + 4) + (7x² + 10)
5. (x³ + x² + 11) + (8x² – 5x – 1)
​