<<< native [ ESqrt (EIdentifier "content") , ESymbol Rel "=" , ESqrt (ESub (EIdentifier "content") (EPhantom (EIdentifier "fail"))) , ESymbol Rel "=" , ESqrt (ESuper (EIdentifier "content") (EPhantom (EIdentifier "fail"))) ] >>> tex \sqrt{content} = \sqrt{{content}_{\phantom{fail}}} = \sqrt{{content}^{\phantom{fail}}}