Simplify:

a⁵ ÷ a³ + 3a x 2a

Simplify:

x⁵ ÷ (x² x y²) x y³

Simplify:

(y³ - 5y²) ÷ y x (y - 1)

(-18xy) - (-8xy) is equal to:

1. 10xy

2. -10xy

3. 26xy

4. -26xy