lim x^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))^(x^(1/x))-x-(log x)^2 as x-> inf