About: http://webisa.webdatacommons.org/108936408

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	Also, there is a study on radicals, roots, complex numbers, combinational math, permutation, probability, and matrices. 13 Subjects: including
http://www.w3.org/ns/prov#wasQuotedFrom	purplemath.com