This evaluation type checks whether the symbol with the highest precedence in the student’s answer is not equal to one of the symbols in the Definition field. The Definition field can contain a list with symbols, separated by a semicolon. For example, times;root checks if the highest symbol is either a times or a root symbol.
Example:
Automated feedback
Below are some examples of what the automated feedback of this evaluation type looks like:
More on evaluation types
An overview of all evaluation types can be found here (for mathematical answers) and here (for text-based answers). More detail on the different fields of a feedback rule can be found here.