This would be a nice feature (even moodle has it).  This would allow complex values to be implemented as solutions, something that I find tedious to do right now because (using "Formulas") you have to pose the question, ask for the real part, then pose the question again and ask for the imaginary part.  When you are teaching with any course that has complex numbers (vibrations, control theory, complex numbers, linear algebra, most courses on engineering or science), this becomes a huge problem.  There are other types of problems that require multiple answers, such as vectors.  You could always use a multiple choice question, but I find multiple choice questions too easy for STEM students, and it is too easy to cheat.  With formula questions, you get a variety of answers, and that is great at thwarting any cheating.  Also, you are giving large hints by posting possible solutions, and that is not how life works.  In real life, you don't have someone who is saying, "Well, the answer could be this." ... View more