| x2+4 |
| x |
| x2-4 |
| x2+2x |
| x |
| y |
| 2x(x+y)+y(x-y) |
| 4x2+4xy+y2 |
| 1 |
| a |
| 1 |
| b |
| 2 |
| 3 |
| 2 |
| 3 |
| (x+y)(x2+y2) |
| x4-y4 |
| 1 |
| x |
| 1 |
| y |
| 2x+5xy-2y |
| x-2xy-y |
| 5 |
| 7 |
| 5 |
| 7 |
| a |
| b |
| c |
| d |
| e |
| f |
| 5 |
| 7 |
| 2a-c+5e |
| 2b-d+5f |
| 5 |
| 7 |
| 5 |
| 7 |
| x+y |
| z |
| x+z |
| y |
| y+z |
| x |
| (x+y)(y+z)(z+x) |
| xyz |
| 1 |
| b |
| 1 |
| a |
| 2a+3ab-2b |
| a-2ab-b |
| x+y |
| z |
| x+z |
| y |
| y+z |
| x |
| (x+y)(y+z)(z+x) |
| xyz |