2a-b
11c2-17
43x-178y
-56x+23y+12
-2x2+3x+4
10x-7y
136x-114
-3a-14b
-6x+9y
11a+16b-4c
13a-5b-7c
5ab-12a+2b
-7ab-212a+283
52x2+34y-43
-2x+27
3a-15
154a+7
4x-5y
x2+11y2
-11x72+41y72-3172
9x35+71y35
23x6-76
-16a4b3
-6m3n4
72x3
-x4y442
-72a3b4c5
-x7y8z948
-189a9b3c5
3x7y8
-23m3
-6a2
-2x2
-8y23x2
-43a3
12y3x3
-649p3q2
81x42y
2m2
2pq3
3a4bc