| -lx |
| -3y |
| lx |
| 3y |
| lx |
| 3y |
| lx-k |
| -x+k |
| lx-k |
| k-x |
| lx-k |
| k-x |
| -xl+lx-k |
| x-l |
| xl-lx+k |
| l-x |
| xl-lx+k |
| l-x |
| -x-k |
| -xl-3x+k |
| x+k |
| xl+3x-k |
| x+k |
| xl+3x-k |
| lx |
| 3y |
| lx-k |
| k-x |
| xl-lx+k |
| l-x |
| x+k |
| xl+3x-k |
| -2f |
| -3y |
| 2f |
| 3y |
| 2f-1 |
| -f+1 |
| 2f-1 |
| 1-f |
| -f2+2f-1 |
| f-2 |
| f2-2f+1 |
| 2-f |
| -f-1 |
| -f2-3f+1 |
| f+1 |
| f2+3f-1 |
| 2f |
| 3y |
| 2f-1 |
| 1-f |
| f2-2f+1 |
| 2-f |
| f+1 |
| f2+3f-1 |