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.
[[-61, -41, -23, -134], [-105, -171], [-7, 60, -173, 11], [-133, -149, -134, -59], [-27, 85, -157, -31]]