<<< native
[ EFraction NormalFrac (ENumber "9") (ENumber "14")
, ESymbol Rel "="
, EFraction NormalFrac (ENumber "9") (ENumber "14")
, EFraction
    NormalFrac
    (EPhantom
       (EFraction
          NormalFrac (EPhantom (ENumber "1")) (EPhantom (ENumber "2"))))
    (EPhantom
       (EFraction
          NormalFrac (EPhantom (ENumber "1")) (EPhantom (ENumber "2"))))
]
>>> tex
\frac{9}{14} = \frac{9}{14}\frac{\phantom{\frac{\phantom{1}}{\phantom{2}}}}{\phantom{\frac{\phantom{1}}{\phantom{2}}}}