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.
[[-13, 20, 20, -181, 23], [-185, -94, -104, 0], [-138, 49], [-1, 49, -178, -114, -31], [-189, -133, -156, 12, -24, -150, -168], [-33, 67, -170, -142]]