Function: numbers("xyx") if numbers("xxr") > minus(numbers("xyx"), numbers('yyx')) else numbers('yyx') if gradient[1](numbers("xyx") if minus(numbers("xyx"), numbers('yyx')) > numbers("xxr") else numbers('yyx')) > minus(numbers("xyx"), numbers('yyx')) else sum(gradient[1](numbers('yyx') if numbers("xyx") > minus(numbers("xyx"), numbers('yyx')) else numbers("xxr")), numbers("xyx") if numbers('yyx') > minus(numbers("xyx"), numbers('yyx')) else numbers("xxr"))