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.
[[-47, -58, -15, -164, 29, -118], [-120, -21, 91], [-88, -139, -142, -149, 99, 36], [-147, 59, -14, 34, -158, 81], [21, 91, -23], [-81, 50], [-24, 44]]