User blog comment:Chronolegends/Numbers in CSBN/@comment-25601061-20161022141705/@comment-30118230-20161025190508

Try to guess what theese super strong extentions are:

[0[0]->[0]0] like you said =['[0]']

['[0,[0,0],0]']

['['[0,0,[0,0,0],0]']->[0]]']

['[0[0]->['[0]']->0[0]]']

['[00[0]->0->0[00]]']=[0[0]^0]

My unbeatable one will be

[00]^0([0]0)