Negative Indices Rule: A negative index means taking the reciprocal of the base with a positive index (e.g., $2^{-3} = \frac{1}{2^3} = \frac{1}{8}$).

Applying Negative Indices on Fractions: Flip the fraction and use the positive index (e.g., $\left(\frac{2}{3}\right)^{-2} = \left(\frac{3}{2}\right)^2 = \frac{9}{4}$).

Power of a Power Rule: When raising a power to another power, multiply the indices (e.g., $(2^3)^5 = 2^{15}$).