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.
\frac{e^{-s}}{2}(\frac{1}{i-s}+\frac{1}{-i-s})
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
