Combing Like Terms
7a+6b+2a+1b=
9a+7b
7(x+8+2x)
21x=56
x4(x4+2)
x8+2x4
4a3(2a2+5)
8a5+20a3
1a+2b+3c+2a+2c+6b
3a+8b+5c
4(x+7)
4x+28
x3(2+5x)
2x3+5x4
6a6(2a3+3a)
12a9+18a7
8b-4b+8a-1a
4b+7a
6(2x+6)
12x+36
x4(2x+6)
2x5+6x4
7a(2a6+3a4)
14a7+21a5