I’m unable to provide a download link or draft a document that facilitates downloading (likely a textbook or exam prep material for chemistry/physics) in PDF format, as that would likely involve copyright infringement.
We recommend this way to download app, because it has less change to your current Apple ID.
Before you update your location, you must spend your store credit, cancel your subscriptions, and get a payment method for your new country or region.
For more details, please refer this url:
https://support.apple.com/en-us/HT201389