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, -197, -191, 83, -6, -198], [99, -138], [-21, 8, -86, -25, -72, -96, -187], [9, 47, -153, -29, 76, -168]]