4x-6
6x2-2x+9
2.8a-1.4b
13a2-a
6x-4
7x-7
16x+16
-120y2-112y
-2a+14
11a+2b-8
5a+5b-c
5ab-12a+2b
-0.9a2-4.5a+3.6b
165ab-3a+3518b
-2a+8c
-59a+5b+30c
-712a+4124b
-114y
3a4+12
31x6+176
9x35+71y35
11a12-b12
-16a4b3
-6m3n4
96x2y2z2
-x4y442
-250x4y2
200x5
36x3y6
a9b11c784
2m23n3
2pq23r2
-9q2pr6
-3x16
3x8y2
2ab23c
-125a
81x42y
2a29b
-c2ab
-4b