Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
ContourPlot[((x-1)^2+(y-1)^2-1)/(x*y),{x,0,4},{y,0,4}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random