Answer
        Op=-
     /       \
   Mult      Answer
   Pow          Op=-
   Term       /      \
   Literal   Mult    Answer
   "2"       Pow     Mult
             Term    Pow
             Literal Term
             "3"     Literal
                     "5"

##</code><code>##

   <objrule: Answer>
        <X=Answer> <Op=([+-])> <Y=Mult>
      | <MATCH=Mult>