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.
expand 1/3((k+1/2)^3 - (k-1/2)^3) - 1/12
expand 1/3((k+1/2)^3 - (k-1/2)^3) - 1/12
Natural Language
Math Input
Extended Keyboard
