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.
[[4, -164, 31, 52, -50, -17], [-126, -37, -118], [75, 64, -52, 72], [-135, -138, -31, 76, -1, -19]]