Evaluate, using identities
(i) 1023
(ii) 993
(i) 1023 = (100 + 2)3
          = (100)3 + 3(100)2 (2) + 3(100)(22) + 23
          = 10, 00, 000 + 60, 000 + 1200 + 8  
           = 10, 61, 208
(ii) 993 = (100 - 1)3
          = 1003 - 3(100)2(1) + 3(100)(12) - 13
          = 10, 00, 000 - 30, 000 + 300 - 1
          =  9, 70, 299
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