bearbecue (./10846) :
bbbbbb... https://www.google.fr/search?q=exp%28-%28%28x-4%29%5E2%2B%28y-4%29%5E2%29%5E2%2F1000%29%20%2B%20exp%28-%28%28x%20%2B4%29%5E2%2B%28y%2B4%29%5E2%29%5E2%2F1000%29%20%2B%200.1exp%28-%28%28x%20%2B4%29%5E2%2B%28y%2B4%29%5E2%29%5E2%29%2B0.1exp%28-%28%28x%20-4%29%5E2%2B%28y-4%29%5E2%29%5E2%29&cad=h

Ceux-là, ils sont énormes, je vais garder le lien