Final answer:
The question appears to discuss multivariable calculus functions and their evaluation over a given domain, but the question's details are disjointed and incomplete. Without additional context or clarification, it's unclear what specific calculation or concept the student needs assistance with.
Step-by-step explanation:
The question seems to be on the topic of mathematics, specifically involving functions of two variables and the calculation of their related expressions over given rectangular domains. Unfortunately, the question contains several disjointed parts that do not provide a clear singular mathematical problem to address. Additionally, some provided equations and conditions are incomplete or out of context, preventing the formulation of a precise answer.
The part of the question that is coherent implies the student might be asked to calculate something related to the function f(x, y) over the region R specified by given inequalities for x and y. An example problem that might be associated with this would be to find the integral of a function over a rectangular region, which is a typical problem in multivariable calculus.
When graphing or calculating the behaviour of a function of two variables, understanding the domain over which the function is being examined is crucial, as is the ability to interpret or visualize coordinates in different systems, such as rectangular or polar coordinates.