Fix inline thread rendering when expanding and contracting.

lms/static/coffee/src/discussion/discussion.coffee

@@ -7,7 +7,6 @@ if Backbone?
         item.discussion = @
       @comparator = @sortByDateRecentFirst
       @on "thread:remove", (thread) =>
-        console.log "remove triggered"
         @remove(thread)
 
     find: (id) ->

lms/static/coffee/src/discussion/views/discussion_thread_inline_view.coffee

@@ -194,6 +194,7 @@ class @DiscussionThreadInlineView extends DiscussionContentView
   expandPost: (event) ->
     @expanded = true
     @$el.find('.post-body').html(@model.get('body'))
+    @convertMath()
     @$el.find('.expand-post').hide()
     @$el.find('.collapse-post').show()
     @$el.find('.post-extended-content').show()
@@ -204,6 +205,7 @@ class @DiscussionThreadInlineView extends DiscussionContentView
   collapsePost: (event) ->
     @expanded = false
     @$el.find('.post-body').html(@model.get('abbreviatedBody'))
+    @convertMath()
     @$el.find('.collapse-post').hide()
     @$el.find('.post-extended-content').hide()
     @$el.find('.expand-post').show()