Find the long run behavior of each of the following functions. If the function goes to $\infty$ or $- \infty$, enter INFINITY or -INFINITY.

(a) As $x \to -\infty$, $-6 x^{-3} \to$

(b) As $x \to \infty$, $\left( 14 - 6 x^{3} \right) \to$