2x+9
3x+3-x-9
x+3+x+6
2(3x-2)+2x-1
x(3+2)-4+3
3x-3
6x+4-2(x-3)
4x-2
2x-6
-3(x-2)-(-x-4)
5x-1
2x+x-3
8x-5
2x+10