2a-b
9xy-30x-15y+1
-x+0.8y+3.6
-234a-17
-2x2+3x+4
13x2-2x+2
-2x+2
-18x3+542x2+116x
7x-1
11a+2b-8
13ab+2a+5b
12x+18y-30
-2x+2.5y
2x-3
22x
31a-b+53c
-9x+11
-12a+b
3x4+54
41a24+524
11x6-136
2x3-2y3
14a2b2c4
4abc25
72x3
a5b6c4
-250x4y2
-27m7n4
-189a9b3c5
a9b11c784
3x
-2y2z3x
9ab
-28a33b2
3x8y2
3c320b4
-24y2x
225c4a4b6
-q2r23
xy4
3a4bc