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.
[[-97, -39, 71, 98], [-186, 28], [99, -50, 15, -110, 43, -60, 6], [38, -59, 11, -139, -21, -51]]