Page 9 - E:\an example only for the students work (1)
P. 9

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                                                                6
                                     18
                                                                   25
                                                           25
                                        1
                 24
             23
                                      13
                                                                                                       3
                                                                                   8
                                                                                         2-1
                                                                                                             3
                               1
                                                                                 2-2
                                                                                                                 2-1
                                                                                           1
                                       2-1
                                                                                                                   1
                                                                                                         2-2
                                                             8
                                                                   2-1
                                2-2
                                                                     1
                                 8
                                          1
                                                           2-2
                                                         10
                                                                                                      3
                             12-1
               22
                                          11
                                12-1
                                                                                                      3
                                          17
          12-1
                                                                                                      3
               21
                                                                                           25
                                                                               7
                                                                                   9
                                                                                                              25
                                                                                                          4
                                                                                                       5
                                                          6
                                                                     10
                             12-2
                                         18
                                                                   9
         1
                                                                                                      3
                 2-1
          2-2
                   1
                                           16
                                                                                                      3
           12-3
                                          11
                                12-1
                             12-1
                                                                                                      3
                                                                                           1
                                                                                                                   1
                                                                                   8
                                                                                 2-2
                                          1
                                                                     1
                                                             8
                                                                                         2-1
                                 8
                                                                                                             3
                                                                                                         2-2
          12-1
                                                                                                       3
                                                                                                                 2-1
                               1
                                2-2
                                                           2-2
                                                         10
                                       2-1
                                                                   2-1
                    20
       12-1
                                      13
                                        1
                                                                   25
                                                           25
          12-1
                                      18
                   1
        1
          2-2
                 2-1
                                    15
                                                               6
              19
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