Checking Tables

Hello Everyone,
I prepared a table where students will write equations. How can I add self-check to each row of the table?
Second question how can I write 7(x+3) in desmos codes. I wrote 7 \cdot (x+3) but not accepted

Thank you

Here is a way to do it by using the student answer as a function and checking several test values against the actual function. It doesn’t check the structure of the answer - for example, the first one will accept 2(x+2) or 2x+4. If you want to limit the structure, that requires a different approach.

Thank you very much, it solves my problem