If you ever found yourself trying to figure out shortcuts while using the Google Docs equation editor, this page might be helpful.
The Google Docs equation editor is based on the LaTeX syntax, but LaTeX is much more complex, so if you aren't familiar with LaTeX, it isn't exactly easy to try and find working shortcuts.
I made this page when I discovered that the shortcuts are actually in the editor code (as an
arialabel
attribute on the buttons themselves), but aren't really available in an easytosearch manner as far as I could find. I am not in any way affiliated with Google.
Element  Shortcut 

\alpha


\beta


\gamma


\delta


\epsilon


\varepsilon


\zeta


\eta


\theta


\vartheta


\iota


\kappa


\lambda


\mu


\nu


\xi


\pi


\varpi


\rho


\varrho


\sigma


\varsigma


\tau


\upsilon


\phi


\varphi


\chi


\psi


\omega


\Gamma


\Delta


\Theta


\Lambda


\Xi


\Pi


\Sigma


\Upsilon


\Phi


\Psi


\Omega

Element  Shortcut 

\times


\div


\cdot


\pm


\mp


\ast


\star


\circ


\bullet


\oplus


\ominus


\oslash


\otimes


\odot


\dagger


\ddagger


\vee


\wedge


\cap


\cup


\aleph


\Re


\Im


\top


\bot


\infty


\partial


\forall


\exists


\neg


\triangle


\diamond

Element  Shortcut 

\leq


\geq


\prec


\succ


\preceq


\succeq


\ll


\gg


\equiv


\sim


\simeq


\asymp


\approx


\ne


\subset


\supset


\subseteq


\supseteq


\in


\ni


\notin

Element  Shortcut 

\frac


\sqrt


\rootof


\subsuperscript


\subscript
or
_


\superscript
or
^


\overline


\widehat


\bigcapab


\bigcupab


\prodab


\coprodab


\rbracelr


\sbracelr


\bracelr


\abs


\intab


\ointab


\sumab


\limab

Element  Shortcut 

\leftarrow


\rightarrow


\leftrightarrow


\Leftarrow


\Rightarrow


\Leftrightarrow


\uparrow


\downarrow


\updownarrow


\Uparrow


\Downarrow


\Updownarrow

Those aren't in the menus, but they work! If anything is missing, feel free to contribute on GitHub.
Element  Shortcut 

Binomial distribution 
\choose

Maximum 
\max

Minimum 
\min

Logarithm 
\log

Natural logarithm 
\ln

Exponent 
\exp
