Installation1. Mount file "zptcmc15.CUE" with any emulator (Daemon Tools, Alcohol ...)2. If installation doesn't start automatically start file "setup.exe", that is in virtual device. Don't let Mathcad reach Internet. Setup will continue. Select "Next". Accept the Agreement.3. Choose "Mathcad" to be installed, then "Acquire a new license", choose a type of installation and click "Next". Installation will start.4. When "Welcome To Mathcad 15.0" screen appears, choose "I want to acquire license via Internet", then "I want a trial license". In the next screen "Create Account" click "Cancel" and confirm exiting License Setup.5. Installation will continue. Let it finish. If error message appears, choose "Ignore".6. At the end - "Next" and "Exit". Confirm exiting PTC setup.7. Open "Crack" folder in virtual device. Get Crack.rar and unrar it.8. Copy cracked mathcad.exe over original. Confirm replacing.That's all. No need to restart.