2a-b
9xy-30x-15y+1
-3512c
54x2+2
2ab+7a-10b
13x2-2x+2
76x+47y-2
-18x3+542x2+116x
-2a+14
-5x+9y+4
-2x+6y+3
-21x+15y
x-7
12x-10
-2x-11
-2x+63y+1
2a-3b
-376a-56
11x3-13
41a24+524
9x35+71y35
x-2
84x3y4z6
-6m3n4
-168a5b3
-x4y442
-72a3b4c5
-p9q5r496
-189a9b3c5
3x5y4
-4y3x
4ab
-2x2
-28a33b2
12x
6ab
-24y2x
81x42y
-q2r23
-y2z
-4p3r3