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.
[[-69, 36, 43], [48, -113], [-90, -56, -153, -174], [-138, -186, -108, -99, -75]]