<<< native [ EArray [ AlignCenter , AlignCenter , AlignCenter ] [ [ [ EGrouped [ EPhantom (EText TextNormal "fail") , EUnder False (EIdentifier "HT") (EPhantom (EText TextNormal "fail")) ] ] , [ ESymbol Rel "=" ] , [ EGrouped [ EOver False (EIdentifier "TH") (EPhantom (EText TextNormal "fail")) , EPhantom (EText TextNormal "fail") ] ] ] ] ] >>> mml $$\begin{array}{ccc}\hfill \phantom{\mathrm{\text{fail}}}\underset{\phantom{\mathrm{\text{fail}}}}{\mathrm{HT}}\hfill & \hfill =\hfill & \hfill \stackrel{\phantom{\mathrm{\text{fail}}}}{\mathrm{TH}}\phantom{\mathrm{\text{fail}}}\hfill \end{array}$$