variables
  x[2] in (0; 0);

function f(x[2])
  return(x(2); -Max(-5; Min(5; 13*x1 + 7*x2)) + x(1));
end

function v(u[2])
  return(x1*((205*x1)/168 + x2/24) + (x1/24 + (13*x2)/168)*x2 + 0.1*(u(1) + u(2))^4);
end