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