a collection of math problems related to the era we are studying each week

a list of sets of equations, terminated by three returns (one for the last equation of the last set, one to mark the end of the last set, and a final one to mark that there are no more sets)

a set of calculations that relate to a particular concept

a set of real-time decisions encountered during operation

Sets of related mathematical questions to be solved or answered together so that the individual answers lend toward the answer to a larger problem to be answered.