<<< native [ ESqrt (EIdentifier "content") , ESymbol Rel "=" , ESqrt (EUnder False (EIdentifier "content") (EPhantom (EIdentifier "fail"))) , ESymbol Rel "=" , ESqrt (EOver False (EIdentifier "content") (EPhantom (EIdentifier "fail"))) ] >>> eqn sqrt content = sqrt {content from {hphantom fail}} = sqrt {content to {hphantom fail}}