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.
[[-28, -4, -20, 8, 14, 97], [-105, -153, -147], [-73, -93, 19, 57, -69, 57]]