| 右x-6 |
| 4-4x+x右 |
| x右+6x+4 |
| 3-x |
| 口(x-3) |
| (x-口)口 |
| 1 |
| x+3 |
| (x+3)口 |
| x-3 |
| 口(x+3) |
| (x-口)口 |
| 口×(4+3) |
| (4-口)口 |
| 7 |
| 口 |
| 口(x-3) |
| (x-口)口 |
| 1 |
| x+3 |
| (x+3)口 |
| x-3 |
| 口(x+3) |
| (x-口)口 |
| 口×(4+3) |
| (4-口)口 |
| 7 |
| 口 |
| m2-n2 |
| mn |
| 1 |
| m+n |
| 1 |
| m-n |
| n |
| m2-n2 |
| 2mn+n2 |
| m2 |
| 1 |
| a2 |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a2 |
| 1 |
| a |
| y4 |
| y8-3y4+1 |
| x2+4x+4 |
| x+2 |
| 2 |
| a |
| a2-3a |
| 2a |
| a2-9 |
| a-2 |
| a2+6a+9 |
|