/**
* Overrides CqQuestionAbstract::evaluateMath()
*
* Checks if the answer(s) have been parsed into variables yet, and does so
* if not.
*/
public function evaluateMath($expression)
{
if (!$this->variablesParsed) {
if (!$this->hasMath()) {
// There is no math environment yet, make parent parse an empty
// expression so it makes a math environment.
parent::evaluateMath("");
}
$this->createVariables();
}
return parent::evaluateMath($expression);
}
