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