Modifiers matching equation:

• complex,
• physical,
• simple,
• transcendental,
• complicated,
• related,
• functional,
• mathematical,
• logical,
• nonlinear,
• operational,
• linear,
• explicit,
• kinetic,
• typical,
• basic,
• model,

Simple categories matching explicit:

• content,
• knowledge,
• quality,
• variable,
• constraint,
• form,
• means,
• arrangement,
• characteristic,
• map,
• codification,
• language,
• rule,
• information,
• work,
• system,
• regulation,
• source,
• communication,
• material,
• links,
• investigation,
• event,
• equation,
• representation,
• message,
• statement,
• structure,
• criterion,
• indicator,
• lyric,
• feature,
• document,
• agreement,
• philosophy,
• attribute,
• theory,
• correspondence,
• direction,
• code,
• item,
• abstraction,
• report,
• service,
• entity,
• interaction,
• hindrance,
• concept,
• process,
• method,
• thing,
• support,
• instrument,
• market,