Sentence:  Usually the work studied offers us a special or even an individualized rendering or treatment of the ideas in question , so that the student finds it necessary to distinguish carefully between the <WSD>several</WSD> expressions of an `` - ism '' or mode of thought . 
Meaning of the word marked with <WSD> tags:  (used with count nouns) of an indefinite number more than 2 or 3 but not many