Answer:

Here are the solutions to the given expressions:

1. (-y + 2xy - 11) - (-5xy - 2) = -y + 2xy - 11 + 5xy + 2 = -y + 7xy - 9

2. (5y³ - 2y + 5) - (2y³ + 3y - 2) = 5y³ - 2y + 5 - 2y³ - 3y + 2 = 3y³ - 5y + 7

3. (3y⁴ - y - 2) - (2y⁴ - 5y - 1) = 3y⁴ - y - 2 - 2y⁴ + 5y + 1 = y⁴ - 6y - 1

4. (b² + 2b + 2) + (2b² - 2b - 10) = b² + 2b + 2 + 2b² - 2b - 10 = 3b² - 4b - 8

5. (y³ + 2xy - y²) + (5xy - 2y²) = y³ + 2xy - y² + 5xy - 2y² = y³ + 7xy - 3y²