About: http://webisa.webdatacommons.org/133065204

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Your math mostly has variables on the left side of the equals sign (storing answers), and the substitution comes from mentally replacing the variables on the right when you are working things out.
http://www.w3.org/ns/prov#wasQuotedFrom	gamedev.net