w = ((x^2+y^2-9)/(x^2-6x+9+y^2) + (-6y*i)/(x^2-6x+9+y^2))

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.