Newbie to Java Programming needs help with calculation

If anyone can give me some direction getting

      String z[] =
          {"x * ([d[0]] / (1 - Math.pow (1 / (1 + [d[0]]), a[0])))",
           "x * ([d[1]] / (1 - Math.pow (1 / (1 + [d[1]]), a[1])))",
           "x * ([d[2]] / (1 - Math.pow (1 / (1 + [d[2]]), a[2])))"};
   
to perform the calculation and then out putting the results in stead of the formula, it would be greatly appreciated.

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When I compile and execute I get:

Response A = 300
Response B = 5660
Response C = $125,000.00

Calculation = x * ([d[0]] / (1 - Math.pow (1 / (1 + [d[0]]), a[0])))
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Here is the part of my code that deals with this:

      String a[] = {"300", "400" "500"};
      String b[] = {"5660", "1880", "884"};
      String c[] = {"2%", "4%", "6%"};
      String d[] = {"0.004166", "0.00333", "0.005"};
      double x = 125000.00;
 

      String z[] =
          {"x * ([d[0]] / (1 - Math.pow (1 / (1 + [d[0]]), a[0])))",
           "x * ([d[1]] / (1 - Math.pow (1 / (1 + [d[1]]), a[1])))",
           "x * ([d[2]] / (1 - Math.pow (1 / (1 + [d[2]]), a[2])))"};
   
               
              int[] AA = new int [2];
              double[] BB = new double [2];
              double [] CC = new double [2];
              double [] DD = new double [2];
             
                         
                for(int i = 0; i == 0; i++)
                {
     
                    //Output
                    System.out.println ("\n Response A  =  " +(a[0]));
                    System.out.println ("   Response B =  " +(c[0]));
                    System.out.println ("   Response C = " +usCFormat.format (x));
         
                    System.out.println ("Calculation = " +(z[0]));
                    System.out.println ("\n");                    
                }
   

then I have this same "for" statement for [1] and [2];



THANKS FOR THE HELP!