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.
[[-54, 44, 83, -159], [-121, -81], [-49, -186], [61, -20], [97, -128], [0, -50, 29, -154, -159, 40, -68], [-30, 77, -132, -155, -1, -90]]