-6y
-8a2+2ab-2b2
-148a+445b
2a-835
2ab+7a-10b
2ab-2a+12b
16x+16
79xy-2512x-12y
7x-1
-5x+9y+4
-2x+6y+3
30x2-35x
-1.2a-3b+24c
-8x-9y
33x-16
a+6
73x-20y
-32a+3b
7m3+83
-11x72+41y72-3172
11a20+47b20
23x6-76
-16a4b3
s4t324
-192m5n5
a5b6c4
-72a3b4c5
-27m7n4
2a4b4c47
3a9b8c420
2m23n3
2pq23r2
9ab
-3x16
9z2x2
8n4m
m24n
81x42y
x2
-5p3q22
-7m2n25