Accepting more than one answer

Questions
1

Right now I am teaching a pre-algebra course and we are focusing on turning words into expressions. For things like the sum of 13 and twice x, I want to use self-checking to accept both 2x+13 and 13+2x. Right now I have it for only one answer using the following:

correct = input1.submitted and input1.latex = “13+2x”
correct: correct

any help would be greatly appreciated.

2

You can check out my code on slide 8 for accepting more than one answer.

3

Thank you that was exactly what I was looking for!