For Mathcad 15 Trial Edition, follow the below process:
1. Select link - https://www.mathcad.com/en/try-and-buy/free-trial
2. Fill the form and #Submit. Post submission, another page will be triggered thanking you for filing up the form and on the bottom of the page there will have an option to download the Software "Download Now"
3. Once you select "Download Now" option, zip folder"Mathcad15-EN.zip" will get triggered.
4. Unzip the folder and run the executable "Setup.exe".
5. If due to some technical reasons you don't receive an email. Than please connect with PTC Sales at Contact PTC Sales Representative or use link to get Technical Support Assisted Community Support, However, for the later user needs to have or create PTC Basic Account.