Simplify each expression. Write answer in descending powers of the variable. I mark each
1)-2-4n³ + 5n - 2 + 5n + 4n³
2) m-8m³+8 - 5 - 6⁴ + 8m
3) (-5 -8n) + (2-6n)
4) (6p - 6p²) - (2p² - 7p)
5) (-2p⁴ + 8p² + 2) + (3p² + 5p³ - 7)
6. (-6m - 4m² - m⁴) - (m - 6m⁴ + 8m²)
7. (3-7x²+8x) - (3x² - x + 6) + (6x² + 2x + 2)