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.
[[90, -195, -74], [26, 57, -51, 22, 26, -81], [7, -101, -36, -163, 88, -121]]