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.
[[99, -101, -88, 15, -73], [38, -143, -93, 43, -104, 48], [-39, -90, 31], [-146, 49, -10, 77, -49, -177]]