| 6 + 6 = | 180°+90° = | 180°+270° = |
| 3 - 4 = | 30°+45° = | 90°-60° = |
| 270°-180° = | 2 + 2 = | 60°+30° = |
| 2π - 2π = | 360°-270° = | 3 - 6 = |
| 2 + 6 = | 2π - 4 = | 90°-60° = |
| 2 - 3 = | 3 + 3 = | 4 - 3 = |
| 3 - 6 = | 6 + 4 = | 360°-180° = |
| 15°-0° = | 30°-15° = | 270°-180° = |
| 6 - 3 = | 3 - 6 = | π + 2 = |
| 360°+15° = | 270°-30° = | 2 + 6 = |