<<< native [ EIdentifier "c" , ESymbol Rel "=" , EOver False (EOver False (EGrouped [ EUnder False (EUnder False (EIdentifier "a") (ESymbol TUnder "\9183")) (EText TextNormal "real") , ESymbol Bin "+" , EUnder False (EUnder False (EGrouped [ EIdentifier "b" , EStyled TextNormal [ EIdentifier "i" ] ]) (ESymbol TUnder "\9183")) (EText TextNormal "imaginary") ]) (ESymbol TOver "\9182")) (EText TextNormal "complex number") ] >>> mml $$c=\stackrel{\mathrm{\text{complex number}}}{\overbrace{\underset{\mathrm{\text{real}}}{\underbrace{a}}+\underset{\mathrm{\text{imaginary}}}{\underbrace{b\mathrm{i}}}}}$$