Answer:
1. 8a³b + 6a²b² - 14ab³
2. - 3x⁴y⁴ + 9x³y² - 21x²y³
3. x³ - x² - 4x + 4
4. 4x³ + 6x² + 2x - 3
5.
[tex] {96y}^{5} - {72y}^{4} - {40y}^{3} + {186y}^{2} - 269y + 80[/tex]
6.
[tex] \frac{ {5a}^{4} }{b} [/tex]
