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.
[[18, -87, -33, -16, 22], [70, -120, -28, 0], [77, -69, -172, -145]]