void normalize(MathData const &, NormalStream &);
void maple(MathData const &, MapleStream &);
void maxima(MathData const &, MaximaStream &);
void mathematica(MathData const &, MathematicaStream &);
void normalize(MathData const &, NormalStream &);
void maple(MathData const &, MapleStream &);
void maxima(MathData const &, MaximaStream &);
void mathematica(MathData const &, MathematicaStream &);