The problem you have shared is:

$(g \ast h)(3)$

To proceed, I would need more details. Specifically:

1. What functions are $g(x)$ and $h(x)$?
2. Is the symbol $\ast$ referring to function composition ($(g \circ h)(x)$) or multiplication of the two functions?

Once I have these details, I can solve the problem.

Would you like to provide more information, or would you like to clarify the functions?