Function: sum(gradient[1](minus(numbers("yyy"), numbers("xxy"))), minus(numbers("yyy"), numbers("xxy"))) if gradient[1](minus(numbers("yyy"), numbers("xxy"))) > sum(sum(gradient[1](minus(numbers("yyy"), numbers("xxy"))), minus(numbers("yyy"), numbers("xxy"))), gradient[1](minus(numbers("yyy"), numbers("xxy")))) else minus(numbers("yyy"), numbers("xxy"))
