Function: sum(minus(product(numbers('xry'), numbers('yyx')), numbers('xry')) if product(numbers('xry'), numbers('yyx')) > product(numbers('xry'), numbers('yyx')) if numbers('xry') > minus(product(numbers('xry'), numbers('yyx')), numbers('xry')) else numbers('yyx') else numbers('xry'), product(numbers('xry'), numbers('yyx')) if numbers('yyx') > minus(product(numbers('xry'), numbers('yyx')), numbers('xry')) else numbers('xry'))