| 1) | 1 1 2- + - 3 10 | 2) | 1 1 1- -  4- 9 6 |
| 3) | 1 1 1- + - 4 3 | 4) | 1 1 4- -  2- 9 7 |
| 5) | 1 1 1- + - 3 5 | 6) | 1 1 3- -  4- 8 5 |
| 7) | 1 1 2- + - 4 11 | 8) | 1 1 4- -  2- 8 3 |
| 9) | 1 1 2- + - 5 11 | 10) | 1 1 1- -  2- 9 5 |
| 11) | 1 1 2- + - 6 9 | 12) | 1 1 1- -  3- 4 5 |
| 13) | 1 1 2- + - 3 4 | 14) | 1 1 3- -  4- 6 4 |
| 15) | 1 1 1- + - 5 10 | 16) | 1 1 5- -  3- 5 4 |
| 17) | 1 1 2- + - 3 3 | 18) | 1 1 4- -  2- 5 3 |
| 19) | 1 1 1- + - 2 9 | 20) | 1 1 5- -  4- 8 4 |
| 21) | 1 1 2- + - 3 8 | 22) | 1 1 4- -  3- 6 8 |
Joke:
If your friend says education is expensive, ask him to try ignorance!