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| 19 - 16 = | 14 - 11 = | 4 + 1 = | 2 + 10 = |
| 15 + 2 = | 1 + 6 = | 8 + 1 = | 9 - 1 = |
| 1 + 3 = | 0 + 17 = | 4 - 3 = | 6 - 5 = |
| 13 - 2 = | 6 + 11 = | 13 - 10 = | 17 - 16 = |
| 3 + 11 = | 13 - 1 = | 1 + 17 = | 10 + 3 = |
| 1 + 8 = | 14 - 2 = | 19 - 15 = | 8 - 7 = |
| 3 + 2 = | 14 - 13 = | 18 - 15 = | 0 + 6 = |
| 3 + 6 = | 2 + 5 = | 5 + 3 = | 17 - 6 = |
| 6 - 4 = | 16 + 1 = | 1 + 10 = | 17 - 4 = |
| 3 + 1 = | 5 + 12 = | 19 - 2 = | 1 - 1 = |
| 13 - 12 = | 2 + 11 = | 5 + 11 = | 1 + 14 = |
| 10 + 8 = | 6 + 10 = | 14 + 2 = | 18 - 2 = |
| 11 + 2 = | 13 - 0 = |