1. (2x)^-2 = 1/4x²

2. 2x^-2 = 2/x²

3. -6^-2m^-1n³ = n³/36m

4. (-5y⁴)^-2 = 1/25y⁸

5. (3y³)⁴(4y²)^-3 = 12y¹² / 12y⁶ = y⁶

6. (-m^-2/n³)^-3 = (-1/n³m²)^-3 = -n⁹m⁶