| b+c |
| a |
| c+a |
| b |
| a+b |
| c |
| b+c |
| a |
| a |
| 3 |
| b |
| 5 |
| c |
| 7 |
| a+b+c |
| b |
| a+2b-3c |
| a+c |
| x+2y |
| y |
| 3x |
| 2x+3y-5z |
| x+2y+3z |
| 3x-2y-z |
| a+1 |
| 20 |
| b+1 |
| 21 |
| a+b |
| 17 |
| a |
| b |
| 8 |
| 9 |
| 8 |
| 9 |
| b |
| a |
| 4d-7 |
| c |
| b+1 |
| a |
| 7(d-1) |
| c |
| c |
| a |
| d |
| b |
| a+2b-3c |
| 2 |
| b-2c+3c |
| 3 |
| c+3a+2b |
| 4 |
| a-2b+3c |
| a+3b-2c |
| 4 |
| 31 |
| 4 |
| 31 |
| x |
| y |
| y-z |
| 2y-x |
| z-x |
| x-y |
| x |
| x+y |
| 1 |
| 3 |
| 1 |
| 3 |
| x+2y |
| 3 |
| x+3y |
| 4 |
| z+5x |
| 5 |
| x |
| 3 |
| y |
| 4 |
| z |
| 6 |
| x+y-z |
| x-y+z |