Function: sum(gradient[1](numbers("xxr") if band pass(numbers('yxy')) > numbers('yxy') else numbers("yyy") if numbers('yxy') > band pass(numbers('yxy')) else numbers("xxr")), band pass(numbers('yxy')) if numbers("xxr") > numbers('yxy') else numbers('yxy') if numbers("xxr") > band pass(numbers('yxy')) else numbers("yyy"))
