When taking the power of a number already raised to a power, multiply the powers.
For example this is how to find the square of 23.
square of 23 = (23)2 = (2 × 2 × 2) × (2 × 2 × 2) = 26
Notice that the answer has an index of 6, which comes from multiplying the powers at the beginning (3 x 2).
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