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.
[[-68, -3, -153, -42, 89, 45], [-108, -152, 76, 37, 30], [-198, 61, -97, 85, 31, -41], [-21, -156], [-147, -8, -59, -53, 31, 49]]