| 1 |
| a |
| ( ) |
| ab |
| xy2 |
| x2y |
| ( ) |
| x |
| 3a |
| a+b |
| 6ab |
| ( ) |
| x2y |
| xy2 |
| ( ) |
| y |
| ( ) |
| 3x+2 |
| 2 |
| 3 |
| 2m |
| m-n |
| ( ) |
| (n-m)2 |
| 1 |
| a |
| b |
| ab |
| xy2 |
| x2y |
| y |
| x |
| 3a |
| a+b |
| 6ab |
| 2ab+2b2 |
| x2y |
| xy2 |
| x |
| y |
| 9x2-4 |
| 3x+2 |
| 2 |
| 3 |
| 2m |
| m-n |
| 2m2-2mn |
| (n-m)2 |
| 1 |
| a |
| b |
| ab |
| xy2 |
| x2y |
| y |
| x |
| 3a |
| a+b |
| 6ab |
| 2ab+2b2 |
| x2y |
| xy2 |
| x |
| y |
| 9x2-4 |
| 3x+2 |
| 2 |
| 3 |
| 2m |
| m-n |
| 2m2-2mn |
| (n-m)2 |