-7y-5
3xy+4x-3y
-4.2a2+4.8a+1.1
-3a+1710b-79
-x+5
13x2-2x+2
920ab-310a-b
79xy-2512x-12y
-2a+14
11a+2b-8
5a+5b-c
-3a+2b
-7ab-212a+283
103a-52b+1415c
33x-16
4a-11b+31
-712a+4124b
-376a-56
x2+11y2
-6x35-3835
-68a15+10615
18a5-5b
84x3y4z6
3x2y
72x3
2x5y4z3
-18ab4c3
2a5b2c3
-p5q4r425
-25x10y63
3a2
4ab
-8p2q7r83
9a2
3x8y2
2ab23c
-125a
3200b
-b26a2
103a2
2xy2z