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.
[[20, -141], [-153, 62, 13, -129], [-197, 78, 14, -101], [40, -136, -81, -138], [-182, 84], [47, -184, -16], [5, -28, -3, -174, -139], [91, -121, -61, 55, 42]]