The full LaTeX formula guide lists Greek letters, operators, arrows, accents, matrices, cases, alignment and much more, each with an example you can copy.
Operators and symbols
Fractions, roots, sums, integrals, limits, vectors.
Matrices and cases
bmatrix, pmatrix, cases, aligned equations.
Full reference
Hub 4 Mech uses KaTeX, which supports almost all LaTeX maths commands. Packages and macros of full LaTeX documents (\usepackage, \newcommand in a preamble) are not available.
