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.
[[-86, 18, -147, -45, 79, -155], [-90, -124, -122, 65], [66, 1, 45, -115], [-149, -45, -45]]