Attached is an algebra filter debugger, to diagnose and possibly solve some common installation problems. You need to put it in the same directory on your server as the algebra filter: moodle/filter/algebra. You can then invoke it via the url:
Everytime, I run the algebradebug.php, it always displays the following error message, but this error does not cause any problem of the debugging. We can still test the maths expression in this debugger.
Notice: Undefined index: QUERY_STRING in c:\inetpub\wwwroot\coursework\filter\algebra\algebradebug.php on line 16