Community Tip - When posting, your subject should be specific and summarize your question. Here are some additional tips on asking a great question. X
Assuming you have installed the software, see here on how to obtain a trial license:
https://community.ptc.com/t5/Mathcad-Installation/Problem-z-instalacja/td-p/1019492
Success!
Luc
"Opening Mathcad Express Free Trial for the First Time": https://www.youtube.com/watch?v=GXlwfOPglk8