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.
[[-9, 83, -23, -170], [-78, -153, 7, -17, -183, -138], [-2, -187, -20], [5, -14, -42, 2, -100, -175, -142], [-54, 15, -94, -150], [-106, -162, -65], [47, 76, -86]]