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.
[[-52, -183, 64], [-176, 64, -31, -144], [18, 95, 18], [-198, -14, -29, 93, 70], [-159, 60, 81, 39, -104], [-197, -133], [-21, 42]]