a |
a |
b |
b |
a |
b |
2a+3b+
| ||
a-b+
|
ab |
a |
b |
a |
b |
a |
b |
2×25b+3b+
| ||
25b-b+
|
58b |
29b |
3 |
3 |
1 |
x |
1 |
y |
1 |
y |
1 |
x |
1 |
10 |
12 |
2 | ||
2-
|
1 |
2 |
1 |
x-1 |
1 |
x+1 |
x |
2x2-2 |
2 |
| ||||
|
6 |
1+
|
3 |
2 |
1+
|
7 |
6 |
1+
|
13 |
12 |
1+
|
1+
|
n2+n+1 |
n(n+1) |
1+
|
1+
|
1+
|
1+
|
1 | ||
|
2 |
A.a=b | B.a>b | C.a<b | D.ab=1 |
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