1 |
x |
1 |
y |
1 |
z |
1989x+1991y+1993z |
1989 |
1991 |
1993 |
k |
x2 |
k |
y2 |
k |
z2 |
k |
x |
k |
y |
k |
z |
1 |
x |
1 |
y |
1 |
z |
1989x+1991y+1993z |
k(
|
k |
1989 |
1991 |
1993 |
| ||
x |
| ||
y |
| ||
z |
k |
1989x+1991y+1993z |
1989 |
1991 |
1993 |
a |
ab+a+1 |
b |
bc+b+1 |
c |
ac+c+1 |
3 |
2 |
1 |
2 |
3 |
2 |
1 |
2 |
4 |
3 |
1 |
3 |
4 |
3 |
1 |
3 |
5 |
4 |
1 |
4 |
5 |
4 |
1 |
4 |
1 |
a |
1 |
b |
4 |
a+b |
a |
b |
b |
a |
x2+x |
x2+2x+1 |
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