Answer
$\frac{1}{x^3}$
Work Step by Step
1. When dividing exponents with the same base (which is x in this scenario) you subtract the exponents so negative four minus negative 1 equals a negative 3 so you get $x^{-3}$.
2. Since you cannot have a negative exponent you take the reciprocal to make the exponent positive therefore giving you a final answer of $\frac{1}{x^3}$
