Function: gradient[0](minus(divide(numbers("xxx"), numbers('yyx')) if numbers('yyx') > numbers("xxx") else numbers("xxy"), divide(numbers("xxx"), numbers('yyx'))) if minus(numbers('yyx') if divide(numbers("xxx"), numbers('yyx')) > numbers("xxx") else numbers("xxy"), divide(numbers("xxx"), numbers('yyx'))) if numbers("xxx") > numbers('yyx') if numbers("xxy") > divide(numbers("xxx"), numbers('yyx')) else numbers("xxx") else divide(numbers("xxx"), numbers('yyx')) > divide(numbers("xxx"), numbers('yyx')) else numbers("xxy") if divide(numbers("xxx"), numbers('yyx')) > numbers('yyx') else numbers("xxx"))