Calcpad
A free software for mathematical and engineering calculations
...Results are collected into professional looking Html reports for viewing and printing. You can also export them to .docx (MS Word) and .pdf files. You can also create dynamic vector drawings and animations to visualize your data.
After installation, you will find a lot of examples for solving different mathematical, mechanical and structural/civil engineering problems in your documents folder. If you like Calcpad, you can donate ♥ the project on GitHub and help for its development: https://github.com/sponsors/Proektsof