Given $P(x)=3 x^5 - 8 x^3 - 6 x^2 + 3 x + 9$,
$P(x)\to$ if $x\to -\infty$,
$P(x)\to$ if $x\to \infty$.
If your answer is $-\infty$, input -infinity; if your answer is $\infty$, input infinity.