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.
[[-13, -74, -40, -96], [-171, -51, -39, -164, -147], [-64, -24, -71, -146, -145], [-56, -114, 39, -173, -186]]