-7y-5
-8a2+2ab-2b2
-52a
-56x+23y+12
-2x-1
-xy-11x+9y
136x-114
10x2+78x+13
-2a+14
10x2-9x+5
-2x+6y+3
9y+8
-4a+28b+0.8
165ab-3a+3518b
13
17x2-7x-82
3128a+8615b
-32a+3b
x2+11y2
-11x72+41y72-3172
4a21-821
x-2
-35x4y5
15a2b2c
72p4q3r5
2x5y4z3
-72a3b4c5
-96x5y3
-189a9b3c5
3a9b8c420
3x
-6a2
-2x2
9a2
3x8y2
6ab
-24y2x
c29a4b4
12xy
m6n24
6x2y2