4x-6
-12x2-2x
1.5a-0.9
-234a-17
-10x-2y+2
-28a2+22a
16x+215
-120y2-112y
-2a-11b
11a+16b-4c
-2x+6y+3
9y+8
-12a+8b-16
-32a+2b-32
11x+5
53x-54
-47x-y
-x-12y
7m3+83
a6-b6
4a21-821
2x3-2y3
33x2y
15a2b2c
72p4q3r5
2x5y4z3
24x4
2a5b2c3
-189a9b3c5
3x7y8
3x
-2y2z3x
8a3b2
-4m3n
9z2x2
3c320b4
m24n
81x42y
-13b
-c2ab
3a4bc