1．a2a53a3
7．3m
m2
．
2．am
p
8．x2y5a3b．
3．m
2m2
3
9．5xx22x12x3x5
4．a2b3ab2
10－2x－52x－5
5．3aba2c6ab2
11－2x23y3y－2x2
6．ab3a2ba2b4c2
12a－52－a6a－6
f132x－3y3y2x－4y－3x3x4y17
1432x12x－1－23x22－3x18x4x7
151xy1x－y1x2y2
3
3
9
19x3x5
161x1x1x21x4
202x33x2
fr