change mathjax version into an optional dash argument, with oprtional version
change mathjax version into an optional dash argument, with oprtional version

Connexions/cnx-recipes,Connexions/cnx-rulesets,Connexions/cte,Connexions/cnx-rulesets,Connexions/cnx-recipes,Connexions/cnx-recipes,Connexions/cnx-recipes,Connexions/cnx-recipes,Connexions/cnx-rulesets,Connexions/cte,Connexions/cnx-rulesets