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.
binom(26,5)+4*binom(26,4)+6*binom(26,3)+4*binom(26,2)+binom(26,1)
binom(26,5)+4*binom(26,4)+6*binom(26,3)+4*binom(26,2)+binom(26,1)
Natural Language
Math Input
Extended Keyboard
