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.
[[7, 12], [-173, 15, -64, -64, -10, 54], [87, 73, -93, -48, -75, -135]]