(VAR x y z )
(STRATEGY INNERMOST)
(RULES 
        +(*(x,y),*(x,z)) -> *(x,+(y,z))
        +(+(x,y),z) -> +(x,+(y,z))
        +(*(x,y),+(*(x,z),u)) -> +(*(x,+(y,z)),u)
        
)