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.
Sum j=1 to 99Sum k=j to 99 (3*j-2)*(3*k+1)
Sum j=1 to 99Sum k=j to 99 (3*j-2)*(3*k+1)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random