phenomenology of equations

                                         The above is the equation of the optical flow

we see the + has a prominent pose and the - (ok we need the distance)
the divide seems extravagant extraneous
I am also squeamish about the multiply

I'm proposing to consider all equations in this appeal of + (adding something) and - (difference/distance)

(In fact I would have preferred it like this

what about this?

)