| |x| |
| x |
| |xy| |
| xy |
| xy |
| x+y |
| yz |
| y+z |
| 4 |
| 3 |
| zx |
| z+x |
| 4 |
| 3 |
| xyz |
| xy+yz+zx |
| x4-y4 |
| x2-2xy+y2 |
| x2+y2 |
| y-x |
| 1 |
| 2 |
| 2a2-2 |
| a-1 |
| m2-16 |
| 3m-12 |
| m+4 |
| 3 |
| m+4 |
| 3 |
| a+b |
| c |
| b+c |
| a |
| c+a |
| b |
| (a+b)(b+c)(c+a) |
| abc |
| ||
| 2 |
| a5+a4-2a3-a2-a+2 |
| a3-a |
| 1 |
| a |
| 1 |
| b |
| 1 |
| a+b |
| a |
| b |
| b |
| a |
| 5 |
| 5 |
| 1 |
| ab |
| 1 |
| (a+1)(b+1) |
| 1 |
| (a+2)(b+2) |
| 1 |
| (a+2007)(b+2007) |
| 2008 |
| 2009 |
| 2008 |
| 2009 |
| 1 |
| 1+a4 |
| 1 |
| 1+b4 |
| 1 |
| 1+c4 |
| 1 |
| 1+x4 |
| 1 |
| 1+y4 |
| 1 |
| 1+z4 |
| a-b |
| c |
| b-c |
| a |
| c-a |
| b |
| c |
| a-b |
| a |
| b-c |
| b |
| c-a |