Each type of basic subject matter may have subcombinations which have utility with other and different types of subject matter;
(Each type of basic subject matter; may have; subcombinations which have utility with other and different types of subject matter) (subcombinations; have; utility with other and different types of subject matter)
Each type of basic subject matter subcombinations
may have have
subcombinations which have utility with other and different types of subject matter
utility with other and different types of subject matter