I disagree, if its not equal to anything it is only a statement. If you typed this statement into your calculator, the calculator would reduce it for you, but if you asked it to graph the function, it would not be able to because it is not a function in its present form. Assuming that it would be a function of x would be a mistake for a computing device because you could very easily be trying to find the function of y instead of x
Obviously we are not reliant on the assumptions that a computing device will make. But it certainly leaves the box very open.
Since humans can make assumptions, I choose not to destory possibilities that are formulated from assumptions made by gathering relivant information.
Since it is a statement and it makes little sense to do anything with it in this form, I assume it is intended to be something else. Since it's obviously not an equation (if it was, it's unlikely that he would have forgotten to set it equal to something), I'll assume that it's a function.
Additionally, if I typed this into my TI-83 as a 'statement,' it would assume it's a function and solve for the generic "F(x)", where x is a defined variable (0 by default, I believe).