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.
[[-34, 6, -29, 63, -72], [-19, 16, 17], [47, 9, -82, 5, -9], [-47, -147, 86]]