15a
-c2-6c
0.7x2-0.4x+y
-18y2-56y
6x-2y+9
3y2-20y
76x+47y-2
-3a-14b
-2a+14
3a-3c
2ab+15a-17b
5ab-12a+2b
-2x+2.5y
-32a+2b-32
-2x+27
-3x-42y+2
3128a+8615b
-114y
-22a5-35
a6-b6
27x4-214
x-2
-16a4b3
3x2y
-168a5b3
a5b6c4
-250x4y2
-x7y8z948
36x3y6
-25x10y63
2m23n3
-2y2z3x
-5x3y
-3x16
12x
6ab
m24n
225c4a4b6
-8x2y3z
a2bc25
6x2y2