Hello Martha,

Thank you for reaching out! Generally, the special characters are provided in an exercise according to necessity. If they are not available in a given exercise, this is likely because the exercise allows for an answer that does not need them. That said, if you are sure that is not the case, could you please submit a support ticket for this issue? This way our support channel can have a deeper look at it.

Please be sure to include a link to your profile and also take a look at this article to make sure you send an effective bug report.

Thanks in advance and best of luck at your school year!

No pi symbol in Android app. Cannot type the word pi in its place.