2a-b
-17a2-2ab+14b2
0.8a2+1.5a-b
-234a-17
-15x-9
-xy-11x+9y
16x+16
218x-218y
7x-1
3a-3c
13a-5b-7c
-3a+2b
-7ab-212a+283
2x-3
10a-b
3a-15
6a-2b
x+23y
7m3+83
a6-b6
27x4-214
x-2
48a2bc
20x3yz43
96x2y2z2
a5b6c4
-250x4y2
-27m7n4
36x3y6
3a9b8c420
-4y3x
-6a2
-8p2q7r83
-3x16
95m4
6ab
3x47
-96m2n5
-8x2y3z
2pq3
6x2y2