7a+15b-21
-3xy-4x-2
0.7x2-0.4x+y
-124a2-12
6x-2y+9
3a2+12a+18
83x-1
10x2+78x+13
-2a-11b
-5x+9y+4
6a+5b+7
9y+8
5x2-9x
103a-52b+1415c
10a-b
2x-23y+59
10x-233y
-18x+4
11x3-13
11x6-5y6
11x6-136
4
-35x4y5
-6m3n4
-168a5b3
2x5y4z3
-18ab4c3
2a5b2c3
2a4b4c47
3x5y4
2m23n3
-6a2
-8p2q7r83
-8y23x2
-10ab3
4y3x2z
-649p3q2
-72qp
10x
a2bc25
-7m2n25