Function: tan(product(divide(band pass(numbers('yxy')) if numbers('yxy') > minus(band pass(numbers('yxy')), numbers('yxy')) else numbers("per"), minus(band pass(numbers('yxy')), numbers('yxy'))), band pass(numbers('yxy')) if minus(band pass(numbers('yxy')), numbers('yxy')) > numbers('yxy') else numbers("per")))
