5A68
      +---------
74C19 | 9594B5A2
       -74C19
        =====
        50C925
       -5C29A7
        ======
         A437CA
        -AA46B1
         ======
          61C102
         -A927CC
          ======
           0C961

base: 13
letters: 0123456789ABC
difficulty: intermediate
restrictions: no multiplication