We all know 2+2=4,2*2=4,2^2=4, etc. So, if we say O(1) means +, O(2) means *, etc. Then we know that 2 O(x) 2 = 4. So, how do we solve for x? If we have 3 O(x) 5 = 24, what is x? Let's say that - is O(-1), / is O(-2), etc (can you define something that uses what it describes to define itself? (the -)?) That would mean x O(y) z = t is the same as x = t O(-y) z right? What other rules are there that are independent of the level of operation?