a-3b+2c |
b-c |
a-3b+2c |
b-c |
2k-9k+10k |
3k-5k |
3 |
-2 |
3 |
2 |
a-3b+2c |
b-c |
3 |
2 |
1 |
5-3x |
3 |
2 |
4 |
x-y |
x2+2 |
π |
7y2 |
3y |
5b |
5a |
9 |
8 |
A.1个 | B.2个 | C.3个 | D.4个 |
x |
x(x-1) |
4 |
m-1 |
x |
2 |
2x+1 |
x |
1 |
2 |
2 |
x |
x+1 |
π |
x-y |
x+y |
x | ||||
|
a2-2ab+b2 |
a-b |
A.1 | B.2 | C.3 | D.4 |
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