– Free via web
Download LibreOffice from www.libreoffice.org or use Google Docs online.
With the release of (the first Intel-native version), Microsoft removed Equation 3.0 entirely. It was replaced by Equation Editor , a simplified tool, and later by the native Office Math Markup Language (OMML) .
Copy the old data manually into the new Word Equation tool.
Have a stubborn Equation 3.0 file that won’t convert? Post on Stack Overflow with tag ms-equation – the community has scripts to extract raw data from the binary OLE stream. But for 95% of users, the free methods above will save the day.
Microsoft Equation 3.0 was licensed from (now part of Wiris), the makers of MathType. It was a lightweight Object Linking and Embedding (OLE) control. However, OLE is a Windows-native technology. On Mac, Microsoft used a different architecture called OLE Automation for Mac —which was deprecated years ago.