a |
b+c |
b |
a+c |
c |
a+b |
a |
b+c |
b |
a+c |
c |
a+b |
c |
-c |
a |
b+c |
b |
a+c |
c |
a+b |
a+b+c |
b+c+a+c+a+b |
1 |
2 |
a |
b+c |
b |
a+c |
c |
a+b |
1 |
2 |
a-b |
a |
5 |
6 |
a |
b |
x+y |
y-z |
a |
b |
2 |
3 |
a-b |
b |
3x+y |
x-2y |
1 |
4 |
x |
y |
x |
2 |
y |
3 |
x+2y |
x-y |
a |
b |
a-b |
a+b |
a |
b |
5 |
4 |
a-b |
b |
2a+b |
a-2b |
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