# Testing Mathematica if you don't have it installed

**Note: this only works if the answer provides a CDF file or Mathematica Notebook file.**

If the answer provides a CDF file or Mathematica Notebook file, you can use the Wolfram CDF Player to view those files.

1. Go to the [CDF Player download page](https://www.wolfram.com/cdf-player/)
2. Fill in the little form.
3. Download the installer and install the CDF player.

## To save a Mathematica file as a CDF file or Mathematica Notebook

If you have a Mathematica answer and want to provide a CDF file or Mathematica Notebook file:

1. Go to File -> Save As (or press <kbd>Shift</kbd>+<kbd>Ctrl</kbd>+<kbd>S</kbd>)
2. Select "Mathematica Notebook" or "Computable Document".
3. Save the file.