Sorry Dive ...
2+0+1+2 = 5
2-0-1-2 = -3 no it doesn't, 2-0=2, then 2-1=1, then 1-2 = -1. Unless you apply brackets.
2x0x1x2 = 0
2/0/1/2 = 1 as someone else said, boom!
Don't know where that leaves you. How about:
+2-0+1-2 =1
What were you trying to get to?
