a |
bc |
b |
ac |
c |
ab |
1 |
a |
1 |
b |
1 |
c |
a |
bc |
b |
ac |
c |
ab |
1 |
a |
1 |
b |
1 |
c |
a2+b2+c2 |
abc |
bc+ac+ab |
abc |
a2+b2+c2-bc-ac-ab |
abc |
a2+(a+1)2+(a+2)2-(a+1)(a+2)-a(a+2)-a(a+1) |
24 |
3 |
24 |
1 |
8 |
1 |
8 |
1 |
13 |
1 |
23 |
1 |
33 |
1 |
993 |
A.4 | B.5 | C.6 | D.7 |
1 |
b |
1 |
c |
1 |
c |
1 |
a |
1 |
a |
1 |
b |
2a |
b+1 |
c-1 |
a-b |
c |
4xy |
x+y |
t+2x |
t-2x |
t+2y |
t-2y |
A.4 | B.0 | C.2 | D.-2 |
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