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.
[[-84, -87, 21, -86], [-136, -18], [-72, -29, -59], [-132, 36], [14, -48, -60, -63], [-91, -133, -108, 35, -76, -108, 45]]