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.
[[-159, 2, -48, 91, -33, -46, 97], [-99, 94, -105, 5, 31], [-67, 94, -81], [-196, 53, 18, -73], [-189, -90]]