@Carl Love Carl,

Thank you for your reply.

The following article, dated 2004, describes the formula question type of Maple TA:

https://www.researchgate.net/publication/235709527_Assessment_with_Maple_TA_Creation_of_Test_Items

Although Maple TA with its formula question must have been introduced earlier, the 2004 date is sufficient for my purpose.

Thanks again for your replies.

@Carl Love 

Thank you for your reply. No, I meant the Mathematical formula question type in Maple T.A.:

https://www.maplesoft.com/support/help/MapleTA10/MapleTAInstructor/ch05s07.aspx

@Kitonum Thank you for your reply. No, I meant the Mathematical formula question type in Maple T.A.:

https://www.maplesoft.com/support/help/MapleTA10/MapleTAInstructor/ch05s07.aspx