15a
3xy+4x-3y
-3512c
-124a2-12
-x+5
-2a+3b
76x+47y-2
79xy-2512x-12y
-2a-11b
-5x+9y+4
6a+5b+7
-2x2-4xy+5y2
4x-6y
12x-10
33x+8
-59a+5b+30c
2a-3b
13x+107
11x3-13
a6-b6
27x4-214
11a12-b12
14a2b2c4
4abc25
-168a5b3
3a4b2c32
12x3y3
-27m7n4
36x3y6
3x5y4
-4y3x
-6a2
-2x2
-28a33b2
12x
12y3x3
-24y2x
-72qp
2m2
-5m4n28
6x2y2