How to input equations into Grapher

[Vegerot]

How would I put an equation like this into Grapher?

 

[Rick314]

How would I put an equation like this into Grapher?

See the English ~80-page users documentation at http://y.barois.free.fr/grapher/Documentation.html, section "Using the Equation Editor" and "Keyboard shortcuts for the equation editor". Plan on reading awhile, but all you need is there.