inline ex collect(const ex & thisex, const ex & s, bool distributed = false)
{ return thisex.collect(s, distributed); }
inline ex eval(const ex & thisex)
{ return thisex.eval(); }
inline ex collect(const ex & thisex, const ex & s, bool distributed = false)
{ return thisex.collect(s, distributed); }
inline ex eval(const ex & thisex)
{ return thisex.eval(); }