Determine the following long-run behaviors. Please use "INF" for positive infinity and "-INF" for negative infinity. If the long run behavior is a number, please enter that number in the blank.
a) As $x \to \infty$, $10x^{10} \to$

b) As $x \to -\infty$, $10x^{-7} \to$

c) As $x \to \infty$, $9x^{-10}+10 \to$

d) As $x \to \infty$, $-10x^{-6}+3 \to$

Hint: