If mathematics has been added to a container element, you need to ask MathJax to typset that mathematics once it is available. This is done using MathJax.Hub.Queue(["Typeset",MathJax.Hub]); or MathJax.Hub.Queue(["Typeset",MathJax.Hub,element]); where element is either a reference to a DOM element, a string containing the ID of an element, or an array of these.