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.
[[-163, -102, -189, 15], [18, -67], [-110, -173, -100, -46, 8], [-175, 75, 20, -50, -121, 64, 22]]