-12c+7
-3xy-4x-2
-1.3a
-234a-17
6x-2y+9
-15x3+6x2+11x
76x+47y-2
1120x2-176xy-112
-2a-11b
11a+2b-8
-2x+6y+3
-2x2-4xy+5y2
25x2-252x+10
165ab-3a+3518b
18x+38
-9x+31y
5x-253
-376a-56
11x3-13
a6-b6
-68a15+10615
23x6-76
-35x4y5
15a2b2c
-56x5y7
a5b6c4
-18ab4c3
2a5b2c3
20m17n11
3x7y8
3a2
-6x2
8a3b2
9a2
-10ab3
12y3x3
b32ac2
225c4a4b6
-94x
-5p3q22
6x2y2