Function: minus(invert(numbers("per") if numbers('xyy') > numbers('ryy') else numbers("xxx")) if numbers('xyy') if numbers('ryy') > numbers("per") else numbers("xxx") if numbers('xyy') > numbers("per") else invert(numbers("xxx") if numbers('ryy') > numbers('xyy') else numbers("per")) > numbers('xyy') if numbers("per") > numbers("xxx") else numbers('ryy') else numbers("per"), numbers("per") if numbers('xyy') > invert(numbers('ryy') if numbers('xyy') > numbers("xxx") else numbers("per")) else numbers('xyy') if numbers('ryy') > numbers("xxx") else numbers("per"))