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.
[[-180, -63, -120, 90, 43, -139, -138], [-72, -150, -84, 32, -104, -41], [-6, 5, -56, -124, 30]]