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Simplify 7^4 and 4.3^3

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a^n=\underbrace{a\cdot a\cdot a\cdot\ ...\ \cdot a}_(n)\\\\7^4=7\cdot7\cdot7\cdot7=2,401\\\\4.3^3=4.3\cdot4.3\cdot4.3=79.507

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