I have a sheet that references data in another sheet within a workbook
in its same corresponding row. For example, for an item in Sheet1 in
row 6 the formula might be:

=Sheet2!F6+Sheet2!G6

Due to the way that the data is loaded (this is part of a complicated
process that I cannot change and I only am able to make updates to my
own sheet) I cannot just define the cell in row 6 to be =Sheet2!
F6+Sheet2!G6 but I can get my desired result by using:

=Indirect("Sheet2!F"&row())+Indirect("Sheet2!G"&ro w())

However, I cannot figure out how to do this when my formula should be
something like:

=Sum(Sheet2!B6:E6)

Any ideas?