| 1) | -1 + 4 + -3 | 2) | 1 + 4 + 16 |
| 3) | -12 + 4 + 10 | 4) | -2 - -6 - 5 |
| 5) | 12 - -7 - -11 | 6) | -3 + 3 + -9 |
| 7) | 13 + 1 - -2 | 8) | 1 + 7 + -12 |
| 9) | -11 + 9 + 10 | 10) | 13 - -5 - 16 |
| 11) | 10 + 8 + -5 | 12) | 5 - -7 - 5 |
| 13) | -6 + 5 + -5 | 14) | -1 - -4 - 20 |
| 15) | 6 + 3 + 18 | 16) | 6 + 5 + 19 |
| 17) | 7 + 8 + -14 | 18) | -9 + 1 - 17 |
| 19) | -7 + 8 + 19 | 20) | -1 + 6 + -6 |
| 21) | 3 + 8 + 10 | 22) | 4 + 3 + -5 |
| 23) | 6 + 7 + -5 | 24) | 14 - -10 - 6 |
| 25) | 3 + 5 + -21 | 26) | 4 - -10 - 10 |
| 27) | -3 - -9 - 13 | 28) | 10 - -1 + 12 |
| 29) | 3 - -2 - -3 | 30) | 12 + 10 + -8 |
| 31) | 4 + 6 + 24 | 32) | -3 - -2 - -16 |
| 33) | 10 - -5 - -11 | 34) | -2 + 3 + -3 |
| 35) | 4 + 1 - -16 | 36) | -5 - -6 - -11 |
| 37) | -3 - -2 - -12 | 38) | 11 - -3 - -16 |
| 39) | -5 + 8 + -7 | 40) | 9 + 4 + 22 |
Joke:
If your father was a mathematician, he would warn you in the form of 'I told you n times; and I told you n+1 times' and so on!