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.
[[-186, -95, -189], [-164, -180, 57], [51, 65], [35, 21, 9, -23, 23], [31, 87, 2, -129, 28]]