15a
-17a2-2ab+14b2
0.7x2-0.4x+y
-45a2-2a
6x-4
-2a+3b
16x+16
1120x2-176xy-112
7x-1
-x2+12x-2
5a+5b-c
-60x2+15x+120
-2x+83
-32a+2b-32
-19x-4
-4a-81b
-112x+512y
-3a+47b
3a4+12
a6-b6
9x35+71y35
11a12-b12
-35x4y5
15a2b2c
-192m5n5
-x4y442
-250x4y2
-p9q5r496
2a4b4c47
3a9b8c420
2m23n3
4ab
9ab
-3x16
95m4
8n4m
-125a
3200b
-13b
-4x3
2xy2z