(x^2)+2x y+(y^2) // Simplify

(E^((x^2)+2x y+(y^2))) // Simplify

(E^(E^((x^2)+2x y+(y^2)))) // Simplify

(E^(E^(E^((x^2)+2x y+(y^2)))))//Simplify

(E^(E^(E^(E^((x^2)+2x y+(y^2))))))//Simplify