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.

>>2
OK doke, I fed it into a calculator.  When x=0, y=-6 you could do by hand really fast.  Other pairs:  (1,0), (2,92), (3,762), (50, 949372844).