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.
[[-71, -152, -101], [-128, -154, -73, -148, -184, -92, 58], [-81, -128]]