public override int Commute(Symbolic x) { }
public override Symbolic Df(Symbolic x) { }
public override Symbolic Subst(Symbolic a, Symbolic x, int count) { return base.Subst(a, x, count); }
public override Symbolic Coeff(Symbolic x) { }
public Symbolic Subst(Symbolic a, Symbolic x, int n);
public Symbolic(Symbolic other);
public Symbolic Df(Symbolic x);
public abstract int Commute(Symbolic x);
public Symbolic Coeff(Symbolic x);
public int Commute(Symbolic x);
public abstract Symbolic Subst(Symbolic a, Symbolic x, int n);
public abstract Symbolic Integrate(Symbolic x);
public abstract Symbolic Df(Symbolic x);
public override Symbolic Integrate(Symbolic x) { }
public Symbolic Integrate(Symbolic x);
public override Symbolic Subst(Symbolic a, Symbolic x, int count) { }
public abstract Symbolic Coeff(Symbolic x);