2x-16
2x2+5x
43x-178y
-56x+23y+12
5x2+4x+3
13x2-2x+2
-178x-25y+1
1120x2-176xy-112
-6x+9y
3a-3c
5a+5b-c
9y+8
3x-2
-16x+15
18x+38
31a-b+53c
10x-233y
-376a-56
3a4+12
a6-b6
11x6-136
18a5-5b
48a2bc
-6m3n4
72p4q3r5
2x5y4z3
112m5n3
-x7y8z948
-189a9b3c5
3x7y8
3a2
2pq23r2
-2x2
9q8r2p
95m4
6ab
b32ac2
-72qp
-13b
-a23
-4p3r3