MathType 6.9b is an older version of the popular equation editor designed for Windows, released primarily to ensure compatibility with Microsoft Office 2016 Office 365 Key Product Details
: Corruption of formulas can occasionally occur during Word-to-PDF conversion in this version; a common workaround is manually opening and reloading the formula within MathType before exporting. Microsoft Learn mathtype 6.9b
For drafting an essay or technical report, efficiency is driven by keyboard shortcuts: MathType 6