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.
[[-136, -164, -67, -110, -128, 70, 4], [10, -104, 57, 18, 39, 31], [21, -154], [-152, -15, -83, -140], [-39, 69, -67, -177, -13]]