Ezelsbruggetje

gistfile1.txt

We remove the operators, just keep the order of digits.
 0123 1230 2013   
 0321 0123 2301    
 1302 0123 0123  

Instant memorize the repeated numbers, so you are left with
       1230  2013   
 0321        2301    
 1302  

Notice that each number contains 4 unique digits. So really you need:
         30    13   
   21          01    
   02  

If we assume each digit is a bit in a binary system, we reduce this to:
        4      5
3              1
2

Memorize the sequence: 23451


Let's study the signs:
+--  -   +
 +  -++  -
 -   +  --+
 
Notice the skew symmetric property, easy to remember.
+ - +
+ + - 
- + + 

So we are left with:
--  
    -+ 
       --
       
Which is MNM in morse code.