| a-b |
| a+b |
| b-c |
| b+c |
| c-a |
| c+a |
| a-b |
| a+b |
| 2a |
| a+b |
| a-b |
| a+b |
| 2b |
| a+b |
| 2b |
| c+b |
| 2c |
| c+b |
| 2c |
| c+a |
| 2a |
| c+a |
| 左 |
| 右 |
| (1+q)(1+p)(1+r) |
| (1-p)1-q)(1-r) |
| ||||||
|
| a2-bc |
| (a+b)(a+c) |
| b2-ca |
| (b+c)(b+a) |
| ab-c2 |
| (c+a)(c+b) |
| 1 |
| a |
| 1 |
| b |
| 1 |
| c |
| 2 |
| x |
| 3 |
| y-z |
| 5 |
| z+x |
| 5x-y |
| y+2z |
| a+b |
| a-b |
| b+c |
| 2(b-c) |
| c+a |
| 3(c-a) |
| a2 |
| x |
| a2 |
| y |
| a2 |
| z |
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