The present disclosure describes methods and systems for a document server communicatively coupled to at least one client computing device, a document comprising an operation log, wherein the operation log comprises at least one first sequential operation defining operations to create data values of the document, a document object model, wherein the document is at least partially positioned on at least one of the document server and a first client computing device of the at least one client computing device, and a formula engine, wherein the formula engine is structured to determine a calculation definition in response to the user formula value and the document object model.