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.
[[40, -99], [-31, -198, 36, 82, 37, -40, 75], [-86, 48, -134, -40, -118]]