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.
Piecewise[{{1/(1-z)^2,0<z<1/3},{1/(4z^2),1/3<z<1}}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
