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.
[[-103, -82], [59, 62, -199, -174, -108, 57], [-106, 45], [-148, -16, -121, -107]]