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.
[[-170, -186, -15], [-130, -93, -50, 88, -170], [-15, -144, -141], [-85, -104, -115]]