## PREP 2015 Question Authoring - Archived

### New version button/Avoiding double negatives

by Regina Souza -
Number of replies: 2
1) Request for a "new version" button
I have used some problems which, after the student writes the correct answer, s/he is able to request a "new version" of the problem. Could you make this available to our course so it would be easy to check different seeds of a problem we design?

2) How does one avoid solutions as in 2(x-(-3)) ?
Is there any difference in how we implement this in the solution field { }
versus when we are writing a solution for the problem?

### Re: New version button/Avoiding double negatives

by Davide Cervone -
I know that there is a relatively new features to allow the "new version" button, but I don't know the details. I think it is something that can be changed in the course configuration, but haven't looked.

As for 2, we will talk more about that on Monday. For now, you can do

$f = Formula("2(x-$a)")->reduce;

BEGIN_PGML
The formula is [_____________]{$f}. END_PGML  You can use the value of $f in the solution section as well as for the correct answer.

Hope that is what you are after.