What's the correct syntax for a conditional expression on an exclusive gateway where you need multiple and/or statements?  Does the use of nested parentheses influence the order the statements are evaluated in?

I want the path to proceed down this branch if:

1. User requests a transfer or new interim location
2. AND the new location is one of these: CAMPUS A, CAMPUS B, DEPT 1
3. AND the current location is not one of these: CAMPUS A, CAMPUS B, DEPT 1

I tried using parentheses to group the and/or statements as demonstrated below, but it doesn't seem to be working (variables and values are correct).  Am I missing something with the logic or syntax or the use of parentheses?

(/dataset/Action_Requested/Transfer="checked"  or /dataset/interim_assignment_location="new location")

and

(/dataset/new_position_campus="CAMPUS A" or /dataset/new_position_campus="CAMPUS B" or /dataset/new_position_dept="DEPT 1")

and

(/dataset/current_campus!="CAMPUS A" and /dataset/current_campus!="CAMPUS B" and  /dataset/current_dept!="DEPT 1")