amsmath - Regular text font boldface subscript in math mode - TeX - LaTeX Stack Exchange
fonts - How can I get bold math symbols? - TeX - LaTeX Stack Exchange
The Fifth Problem of Algebraic Regression: The System of Conditional Equations: Homogeneous and Inhomogeneous Equations: $$\{\mathbf{By} = \ mathbf{Bi}\ \mathbf{versus} -\mathbf{c} + \mathbf{By} = \mathbf{Bi}\}$$ | SpringerLink
Unable to make math mode bold · Issue #164 · yzhang-gh/vscode-markdown · GitHub
fonts - Greek characters inside \mathrm and \mathbf cause garbled output - TeX - LaTeX Stack Exchange
symbf does not play nice with \hat, \tilde, etc. · Issue #501 · wspr/unicode-math · GitHub
Learn how to bold math symbols: Easy steps - LaTeX-Tutorial.com
latex - bold not bold enough in math - TeX - LaTeX Stack Exchange
math mode - Faster way of writing \mathbf - TeX - LaTeX Stack Exchange
How to Add Mathematical Expressions to your Assessments : LearnWorlds Help Center
Gro-Tsen on Twitter: "Classic LaTeX: the answer to a question which aught to be trivial (getting bold math!) reveals (https://t.co/1ZLpXve2VU) the existence of about 42 packages to do it, with obscure interactions