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| 3 - 2 x 1 = 1 |
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| 3 / 1 - 2 = 1 | |||||
| (2+1) / 3 = 1 | |||||
| (3-2) x 1 = 1 | |||||
| (3-1) / 2 = 1 | |||||
| 3 x 1 - 2 = 1 | |||||
| 3 - 2 / 1 = 1 | |||||
| 1 / (3-2) = 1 | |||||
| 2 / (3-1) = 1 | |||||
| 3 / (2+1) = 1 | |||||
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