x-4y+2
6x2-2x+9
0.1x-1.2
-234a-17
7x-8
-3x2+9x
136x-114
1120x2-176xy-112
7x-1
-5x+9y+4
6a+5b+7
-60x2+15x+120
-0.9a2-4.5a+3.6b
2x-3
-2a+8c
-2x+63y+1
11x
-239x-12
-22a5-35
-11x72+41y72-3172
4a21-821
x-2
-35x4y5
-6m3n4
-56x5y7
3a4b2c32
-18ab4c3
-p9q5r496
20m17n11
-25x10y63
2a
-6a2
-8p2q7r83
-8y23x2
3x8y2
2ab23c
m24n
3200b
x2
xy4
2xy2z