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.
[[38, 37, -11], [-101, 80, -9, -10], [94, -94, -113, -46, 37, -91, -147], [-58, 31, -157]]