| 1 |
| 2 |
| x1+x2 |
| 2 |
| 1 |
| 2 |
| f(x1)+f(x2) |
| 2 |
| x1+x2 |
| 2 |
| g(x1)+g(x2) |
| 2 |
| x1+x2 |
| 2 |
| 1 |
| 2 |
| f(x1)+f(x2) |
| 2 |
| x1+x2 |
| 2 |
| f(x1)+f(x2) |
| 2 |
| x1+x2 |
| 2 |
| x12+x22 |
| 2 |
| x1+x2 |
| 2 |
| x12-2x1x2+x22 |
| 4 |
| 1 |
| 4 |
| f(x1)+f(x2) |
| 2 |
| x1+x2 |
| 2 |
| g(x1)+g(x2) |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| x1+x2 |
| 2 |
| 1+2 |
| 2 |
| 3 |
| 2 |
| 2 |
| 1 |
| 2 |
| g(x1)+g(x2) |
| 2 |
| x1+x2 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| f(x1)+f(x2) |
| 2 |
| x1+x2 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| x1+x2 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| x1 |
| 2 |
| 2 |
| 3 |
| x1 |
| 2 |
| 2 |
| 3 |
| x2 |
| 2 |
| 2 |
| 3 |
| x2 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| x1 |
| 2 |
| 2 |
| 3 |
| x2 |
| 2 |
| f(x1)+f(x2) |
| 2 |
| x1+x2 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
| k |
| x+k |
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