2a-b
9a2-4b2+5
0.1x-1.2
-3a+1710b-79
-x+5
-28a2+22a
2x+12y+9
10x2+78x+13
-2a+14
3a-3c
13ab+2a+5b
-60x2+15x+120
25x2-252x+10
-32a+2b-32
40x+3
-3x-16y-39
-3x-14
7x-1
x2+11y2
-6x35-3835
-68a15+10615
18a5-5b
-35x4y5
15a2b2c
72x3
-m6n72
-72a3b4c5
200x5
2a4b4c47
3x7y8
2m23n3
-2y2z3x
-2x2
-8y23x2
9z2x2
6ab
-649p3q2
-72qp
-13b
2pq3
-4p3r3