Answer
x(x^2 - 1)
Explanation
Order of Operations is BIDMAS
Therefore division before subtraction.
x^2 / x^1
Use law of indices where
x^m / x^n = x^m-n
So
x^2 / x^1 = x^2-1 = x^1 = x
x^3 - x is no possible as they aren’t like terms, However you can factorise to obtain
x(x^2 - 1)