[betterunix]

"You can't simplify this"

I have learned to be careful about making such claims.

http://mathworld.wolfram.com/NestedRadical.html

[darkmighty]

Yea but simplifications like this are probably non-computable, even when possible, and hard to do in any case.

[blackhole]

Wrong, that isn't what this is. This isn't a nested radical to infinite terms, it's a nested radical to n terms. Thus, it cannot be simplified.