7a+15b-21
2x2+5x
1.5a-0.9
76x2+x-56
2ab+7a-10b
-3x2+9x
-x-3
1120x2-176xy-112
7x-1
11a+16b-4c
13a-5b-7c
-60x2+15x+120
4x-6y
-32a+2b-32
33x+8
-9x+31y
154a+7
-239x-12
3a4+12
-11x72+41y72-3172
11x6-136
2x3-2y3
14a2b2c4
3x2y
96x2y2z2
-m6n72
12x3y3
-27m7n4
-189a9b3c5
3x5y4
3x
4ab
8a3b2
-8y23x2
-43a3
12y3x3
m24n
c29a4b4
-8x2y3z
-4x3
3a4bc