  "Ducter"
 .
  "Ducter",  "",     -   .     "freeware".       ,    .

       .            .    ,     ,   .       353-86  , ..         .    , ,          ,      ,   .     R    .        .            .      .      -        -     Ctrl+D.       -  * - *.

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    * 1.0.0.2
      [+]       .   ->.
    * 1.0.0.3
      [+]   -            ,      .
    * 1.0.0.4
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    * 1.0.0.5
      [v] ,      .
      [v]     
    * 1.0.0.8
      [+]       a*b,   b*a
      [+]    
      [+]          
      [+]     ( VladoS)
      [v] ,     *  -
    * 1.0.0.9
      [v] ,         
      [+]      
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    * 2.0.0.1
      [+]   
      [+]    
      [+]      -     
      [-] 
      [v] ,          
      [+]  .     .
      [v]     Shift+Esc
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      .
    * 2.0.0.2
      [+]     3/ ( )    / ( , )
      [v]    -    
     *2.0.0.3
      [+]   ,   ,  ,  ,    , ,  , 
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      [-]   ,    .
      [v]     ,   
      *2.0.0.3* 
      [-]     . ..      .
      [+]       
      [v]  
      *2.0.3.1
      [+]      ,  +,-,*,/,=