Raj is simplifying (5 Superscript 4 Baseline) cubed using these steps: (5 Superscript 4 Baseline) cubed = 5 Superscript 4 Baseline times 5 Superscript 4 Baseline times 5 Superscript 4 Baseline = 5 Superscript 4 + 4 + 4

Although Raj is correct so far, which step could he have used instead to simplify the expression (5 Superscript 4 Baseline) cubed?
5 Superscript 4 times 3 Baseline = 5 Superscript 12
5 Superscript 4 + 3 Baseline = 5 Superscript 7
4 Superscript 5 times 3 Baseline = 4 Superscript 15
4 Superscript 5 + 3 Baseline = 4 Superscript 8