| x2 |
| 1+x2 |
| 1 |
| 1+1 |
| 1 |
| 2 |
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| x |
| 1 |
| 2011 |
| 1 |
| 2010 |
| 1 |
| 2009 |
| 1 |
| 2008 |
| 1 |
| 2007 |
| 1 |
| 3 |
| 1 |
| 2 |
| a-1 |
| a2-4a+4 |
| a2-4 |
| 2a-2 |
| x2-4x+4 |
| 2x |
| x2-2x |
| x2 |
| 2 |
| 1 |
| x-1 |
| x |
| x2-1 |
| x2+1 |
| x2-1 |
| x-2 |
| x-1 |
| x-2 |
| x |
| xz-oyz |
| xz-oxy+oyz |
| 地 |
| z |
| 1 |
| x-1 |
| x |
| x2-1 |
| 1 |
| x-1 |
| 1 |
| x+1 |
| x |
| 2x2-2 |
| 1 |
| 2 |
| 4ab |
| a-b |
| a |
| b |
| b |
| a |
| 1 |
| a |
| 1 |
| b |
| 3 |
| 3 |