/ {x {t (} {n Expression} {t )}} {x {n Factor} {* {x {n MulOp} {n Factor}}}}
x {t (} {n Expression} {t )}
t (
n Expression
t )
x {n Factor} {* {x {n MulOp} {n Factor}}}
n Factor
* {x {n MulOp} {n Factor}}
x {n MulOp} {n Factor}
n MulOp
n Factor
