Question

-a+2a-8a+2
12-3n+5n
6x-12-7x
-6a-12a-7
9d-3d-20
-8a+6a-5a
x-6-3x+9
-5-(8-m)
-2x+(4+m)-5x
2-(4+m)-5
4m-(4+m)+5
2m+(4-m)+5
15-(8+m)
-x+5y+6x+5y
-5(x+2)+2(x-3)
14*(3x+5y)
(2x-19)-5x+5
8-(3x+y+7)
2(5a+2)-3*(a+3)
5(4x+3y)-7(2x-y)
2*(a+2b+3c)-4(a-b)