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, 55, -104, 15, -137], [-46, 84, -31, -78, -152, -188, -8]]