A.6.3.RT.OE:3 - Forces

Force	Tension
Shared content and different groupings	One part can participate in several useful relations; a presentation can hide that common part.
Concision and recoverable operation	Short expressions save space while suppressing intermediate structure the user needs.
Useful arrangement and added meaning	Position, grouping or timing can expose a relation or silently introduce one.
Stable reference and changing construction	New parts must remain related to the earlier ones while the work develops.
Available notation and recipient preparation	The same expression can support a trained operation and leave another recipient unable to begin.
Representing and discovering	Working through an expression can produce a new result that was not already given.