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If I've counted my 9's correctly, this should work:

99 + 99/99 - 99/99 + 99/99 - 99/99 + 99/99

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How can you use 22 "9's" to express 100?

(9/9)*(9/9)*(9/9)*(9/9)*(9/9)*(9/9)*(9/9)*(9/9)*((9/9+(9*9)+9+9))

After looking at scuttill you can modify it by this:

(99999999/99999999)*(9/9+(9*9)+9+9)

Edited by PolishNorbi

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