If you use greek letters, mathematical symbols, or even particular emojis a lot you can make easy keyboard shortcuts for them in System Preferences. This makes typing notes and equations much easier. :
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Lists - Overleaf, 온라인 LaTex 편집기
Greek Alphabet Letters ✂️ Copy and 📋 Paste 👌
List of Greek letters and math symbols - Overleaf, Online LaTeX Editor
support for non-LaTeX greek symbols · Issue #1282 · KaTeX/KaTeX · GitHub
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