All of our papers are shared with answers and teacher markings and remarks on them. We only require the sharer to remove all private information including their signature, child's name and class, teacher's names and school name to protect their privacy.
However, they are not required to remove the answers. This is because it is an effort to take picture, turn them into pdf and share. The effort to remove answer is on the user.
If you are using the papers and you wish to know how to blanco the pages digitally, here is a step-by-step tutorial for you.