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.
[[-91, -40, 2, -61, -106, 18], [-19, -180, -161, -69], [96, -106, -177, -171, 73, 50], [-35, -18, 84, -94, 72], [-21, -60, 90, -138, -128, -72]]