Polynomial

I need to know what the value of this polynomial will be if x=2, x=3, x=4. For some reason I'm coming up with the result being the exact same as the x-value, and am not sure if that is a semantic error or not.

This polynomial is the so-called "Smarandache" polynomial, which has the remarkable property that for any integer x, it will output that same integer if you feed it x. Smarandache himself wanted to call it the "undigested sweetcorn" effect, but fortunately his university peers persuaded him against the idea.