Heureka
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You want to satisfy 7 7 7 = 10 You can add, subtract, multiply and divide, use parentheses, square root, exponent and factorial. So, for example: 2^2 + 2^2 +2 = 10 Sqrt(4) + 4 + 4 = 10 8 + 8^0 + 8^0 = 10 You are also not allowed to manipulate the right side of the equation (e.g. 7^0 * 7^0 * 7^0 = 10^0).