4x-6
-5x2+2x-7
-x+0.8y+3.6
-234a-17
-x+5
-28a2+22a
-x-3
-120y2-112y
-2a-11b
-5x+9y+4
6a+5b+7
32x+40
3x-2
165ab-3a+3518b
-19x-4
17x2-7x-82
-9x+11
-6x+23y
11x3-13
a6-b6
27x4-214
23x6-76
14a2b2c4
3x2y
72x3
2x5y4z3
-72a3b4c5
-96x5y3
32x6y7
3x7y8
2a
-6a2
9ab
-8y23x2
12x
6ab
-649p3q2
81x42y
2a29b
-4x3
-7m2n25