Basically it renders complex equations like this one:
e = (1-(B1.rV1*2)/μ_S(2-(B1.rV1*2)/μ_S)math.cos(γ1)*2)*(1/2)
as math type (i.e. like LaTeX), directly in your code. This can help read or "debug" equations (plus it just looks pretty).
Try it for free at https://getluminal.com and let us know what you think!