int ldegree(const ex & s) const override;
ex coeff(const ex & s, int n = 1) const override;
ex eval() const override;
- ex evalf(int level=0) const override;
+ ex evalf() const override;
ex evalm() const override;
ex series(const relational & s, int order, unsigned options = 0) const override;
ex subs(const exmap & m, unsigned options = 0) const override;