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.
[[-117, -86, -134, 88, -183, -189, 12], [-91, -126], [36, 63, -200], [-121, -16, 96], [52, -142, -136, 69, -39], [34, -123, -185, -20, 48, 9, 75]]