Following the suggestions for redirecting URL based on values, I see that the following formula works:

{if(firstquestion == 1, equation1, equation2)}

but the following does not (yes, I have changed the values in the "Text Elements" and questions)

{if(firstquestion == A1, equation1, equation2)}

Thank you.

Remind to always look at survey logic file : it's done for this … and here it show the error.
manual.limesurvey.org/Check_question_logic

manual.limesurvey.org/Show_logic_file

To add to Denis:

1 is an integer ==> firstquestion == 1 is OK.
A1 is a string ==> you need "".

But as far as I remember of my time when I programmed in PHP and JS a bit more, this is also the case for other programming / scripting languages and might throw an error there too.

thanks. I tried with the quotation marks and still didn't work. But the numbers work and I can work with that.

Is there a way to system-wide make questions as numbers instead of A1, A2, etc.?

I comforted updated yesterday so I do have the latest.

If it don't work it's a major issue that must be fixed ,

But maybe there are another things …
If you are sure it don't work : please report the issue …