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.
[[2, -174, -142, -89], [-198, 93, -50, -38], [-149, -53, 8, 15], [-178, -101, -110, -46, -135], [-89, -64, -157, -173, 31], [-121, 90], [-75, -175]]