Function: minus(numbers('epe'), numbers("yxx")) if numbers('epe') if minus(numbers('epe'), numbers("yxx")) > numbers("yyy") else numbers("yxx") > numbers('epe') if minus(numbers('epe'), numbers("yxx")) if numbers("yxx") > numbers('epe') else numbers("yyy") > noise(minus(numbers('epe'), numbers("yxx")) if numbers("yyy") > numbers("yxx") else numbers('epe')) else minus(numbers('epe'), numbers("yxx")) else noise(numbers('epe') if numbers("yxx") > numbers("yyy") else minus(numbers('epe'), numbers("yxx")))