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.
[[-76, 100, -84], [-91, -180, 47, -31, -34, -163], [-100, -38, -90, -185], [-138, 41, 94], [-7, -189, -90, -88]]