-17a
-a2-8a+1
-x+0.8y+3.6
13a2-a
-x+5
13x2-2x+2
-178x-25y+1
29x2+32x
-2a-11b
-5x+9y+4
13a-5b-7c
-2x2-4xy+5y2
-1.2a-3b+24c
-8x-9y
33x+8
a-1
3x-14
2a+5b
x2+11y2
-11x72+41y72-3172
-68a15+10615
18a5-5b
84x3y4z6
-6m3n4
-56x5y7
3a4b2c32
24x4
2a5b2c3
-189a9b3c5
-25x10y63
-4y3x
2pq23r2
-2x2
-4m3n
12x
6ab
-649p3q2
-72qp
-8x2y3z
-5m4n28
6x2y2