In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[39, -63, 21], [-134, -14, 12, 64, 37, -16], [92, -73, -100, -162, -9], [80, 21]]