User blog comment:Googleaarex/R Function FGH/@comment-11227630-20131224075705

Wrong still. The {0{0,1*}1}{0{0,1*}1} means psi(psiI(1,0,0,0)(0)). The first {0{0,1*}1} should find an {0{ ____ *}1} but there's none, so it become {0{{0{0,1*}1}{0{0,1*}1}*}1}, then expands to {0{{0{...{0{{0{{0{0,1*}1}*}1}{0{0,1*}1}*}1}...{0{0,1*}1}*}1}{0{0,1*}1}*}1}. And {0,1{0,1*}1} is above that. What's psi(psiI(I(1,0,0),1)(0)) is only {0{{0{{0{0,1*}1}*}0,1}*}1{{0{0,1*}1}*}0,1}.

Also, things like psi(psiI(1,0,0)+1(0)) is illegal. You maybe mean psi(psiΩ(I(1,0,0)+1)(0)) here.