JLE
       ----------
LMNQNG ) RGQJQEEJ
        -NQHJXG
         ======
          EQHNEE
         -QJLHLG
          ======
          MMNRJEJ
         -MGXLJGG
          =======
            XEGEJ

base: 10
symbols: EGHJLMNQRX
difficulty: intermediate
restrictions: no multiplication