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.

Sorry, I'm such a burnout:
3x^5 + 2x^4 - 5x^3 - x^2 + 7x - 6
Just need to know what it will be with ANY value of x, so long as you tell me what that value is.