x-4y+2
a2+9
0.7x2-0.4x+y
76x2+x-56
7x-8
-28a2+22a
920ab-310a-b
10x2+78x+13
-2a-11b
11a+16b-4c
-2x+6y+3
10ab-15a+45b
-2x+2.5y
332x-110y
10a-b
2x-23y+59
-476x-298
7x-1
x2+11y2
-11x72+41y72-3172
11a20+47b20
x-2
48a2bc
3x2y
72x3
3a4b2c32
-250x4y2
-96x5y3
20m17n11
a9b11c784
-4y3x
-6x2
-2x2
-28a33b2
9z2x2
2ab23c
m24n
225c4a4b6
-13b
-5m4n28
6x2y2