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.
Simplify[ExpToTrig[ E^(I E^(I Pi/4) - I 3 Pi/4) + E^(I E^(I 3 Pi/4) - I 9 Pi/4)]]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random