Like when your main focus is array math, and you work with a uniquely different database on each of 5 worksheets and the deliverable output has to be in the for

Like when your main focus is array math, and you work with a uniquely different database on each of 5 worksheets and the deliverable output has to be in the form of another Excel spreadsheet anyway? And it has nothing to do with the web or networking at all? JK, I know you mean much lesser scale of complexity.