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.
[[-37, -136, 90, -104], [-33, -60, -12], [-7, -27, 100, -101, -172], [6, -150, -75]]