Oh god why are there 2 midterms in a row
Also, the lecture slides are a monolith holy
You should have pdflatex installed on your computer (usually you accomplish this by installing texlive on your computer).
Then, you can generate the PDF by executing:
pdflatex review.texI think you can also go "New Project" => "Import from GitHub" to edit on Overleaf, but you would still have to fork this repository and make pull requests.