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Lots Of 7 & Lots Of Luck

Algebra

Which of the following is equal to $\large \dfrac{7^{7^{7}}}{(7 \times 7)^{7}} ?$

\frac{111}{2}

7^{7}-7

7^{42}

7^{70}

7^{7^{7}-14}

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by Margaret Zheng

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