The difference between the modes of expression in the same verse

In discussing the differences between the modes of expression in the same verses، the question is what factors cause these differences in verses of Quran? What makes up a word of a verse is ahead and in its same verse be later? or How to deleted words from a verse is cited in its same verse? And… In general، this difference modes return to the three factors include the meaning context، textual context and diversity in expression. Meaning and textual context explain why a Quranic word belong to a specific sura and diversity in expression only explain the reason of word difference in save verses.