<<< native [ EOver False (EIdentifier "_ baseline _") (EIdentifier "over script") , ESymbol Rel "=" , EOver False (EUnder False (EIdentifier "_ baseline _") (EPhantom (EIdentifier "fail"))) (EIdentifier "over script") ] >>> tex \overset{over\ script}{\_\ baseline\ \_} = \overset{over\ script}{\underset{\phantom{fail}}{\_\ baseline\ \_}}