7a+15b-21
2x2+5x
0.1x-1.2
118x2+34x
5x2+4x+3
3a2+12a+18
16x+16
-18x3+542x2+116x
-2a-11b
11a+16b-4c
6a+5b+7
12x+18y-30
x-7
2x-3
11x+5
3a+24
-3x-14
-6716a+49b
-22a5-35
31x6+176
4a21-821
23x6-76
-35x4y5
3x2y
-168a5b3
a5b6c4
-72a3b4c5
-p9q5r496
-189a9b3c5
3a9b8c420
2m23n3
-6a2
9ab
-3x16
95m4
3c320b4
m24n
-96m2n5
-q2r23
-5p3q22
-4p3r3