Answer:

1. 30a⁴y - 35a⁴

2. -x²

Step-by-step explanation:

1. 5a⁴ × 6y =30a⁴y

5a⁴× (-7) = -35a⁴

=30a⁴y -35a⁴

2. 2x² + 5y - 3x² - 5y

2x² - 3x² = -x²

5y - 5y = 0

-x² + 0 = -x²