The example you gave is just so buggy; why do you think that this is worth sharing with the world yet?

The very first question is full of obvious bugs.

You have 'find . -name "notes.txt"' selected, it then says 'You submitted: ls -R | grep notes.txt: find . -name "notes.txt"', then it responds:

'Thanks — your answer looks like it was partially entered.

'You picked find . -name "notes.txt" (good choice). The submission shows an escaped/unfinished string: find . -name \. The correct full command is find . -name "notes.txt", which searches recursively from the current directory for files or directories named exactly notes.txt.'

There seems to be some weird kind of quoting issue going on there. I would fix obvious issues like that before sharing this with the world.