Google er super god til grafer

Prøv at Google dette:

exp((-(((x-4)^2+(y-4)^2)^2))/1000)+exp((-(((x+4)^2+(y+4)^2)^2))/1000)+0.15*exp(-(((x+4)^2+(y+ 4)^2)^2))+0.15*exp(-(((x-4)^2+(y-4)^2)^2