If you had used the TPM bypass method to install 21H2 those methods don't work now. However, you can download the ISO using Rufus after configuring the (new bypass methods) Rufus settings as in this screenshot: https://imgur.com/a/s4P2SyB and run setup.exe from that ISO.
Before doing so, please start Windows in Safe mode (How-To: Start your PC in safe mode) and see if the MS Mathematics app works in Safe mode (where the Microsoft basic display drivers are loaded instead of NVIDIA's). If the app works in safe mode but not in normal mode, the culprit might be your NVIDIA drivers or the settings.