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.
[[-46, 68, 86, -191], [73, 4, -121], [-90, -190, -113, -134, 3, -90], [-83, -131, -13]]