measurement circuit

Hi everyone! Can i please get some of your expertise on this circuit.
I need to find an equation to represent the differential gain of input and output stages as well as the overall as a function of jw.

**broken link removed**

cheers in advance

homework.? btw this is an instrumentation amp ( u know that right.? )

its a homework q yeh -> yeh i know its an instrumentation map yes. just dont know how to express in jw terms - thats all : >