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$\large \ \ 9 \ \ 9 \ \ 9 \ \ 9 = \ \ 7 \ \ 7\ \ 7 \ \ 7$

Is there any combination of symbols that makes the equation above true?

Note: You can also add symbols to the results of the numbers. For example, you do $$9 \times 9 \times 9 \times 9$$ = $$6561$$, you can still add symbols to that number. Also, you cannot use division.

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