2a-b
-17a2-2ab+14b2
-x+0.8y+3.6
-234a-17
4x+6
2ab-2a+12b
83x-1
-18x3+542x2+116x
-6x+9y
10x2-9x+5
2ab+15a-17b
10ab-15a+45b
3x-2
165ab-3a+3518b
-6x+19
2a-26b-39c
154a+7
-239x-12
x2+11y2
11x6-5y6
11a20+47b20
18a5-5b
14a2b2c4
s4t324
-56x5y7
-5a2b4c4
24x4
2a5b2c3
20m17n11
3x5y4
3x
-6x2
-5x3y
9q8r2p
-43a3
12y3x3
m24n
225c4a4b6
-8x2y3z
-xy2
3a4bc