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Inverting a rather complex set of regexes


use this pattern

((#w{6}|/[/(+^-]|$w+|||)*).

and replace w/ $1§
Downside is your preserved pattern has to be followed by at least one character
Demo

(                   # Capturing Group
(1)
  (                 # Capturing Group (2)
    #               # "#"
    w              # <ASCII letter, digit or
underscore>
    {6}             # (repeated {6} times)
    |               # OR
    /              # "/"
    [/(+^-]    # Character Class [/(+^-]
    |               # OR
    $              # "$"
    w              # <ASCII letter, digit or
underscore>
    +               # (one or more)(greedy)
    |              # "|"
    |               # OR
    |              # "|"
  )                 # End of Capturing Group (2)
  *                 # (zero or more)(greedy)
)                   # End of Capturing Group (1)
.                   # Any character except line
break  

Code copied from Regex101

var re =
/((#w{6}|/[/(+^-]|$w+|||)*)./gm;   
var str = 'This#00CC00 is green$Courier| and
/^mono|spaced|
';  
var subst = '$1§';   
var result = str.replace(re, subst);

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