From the article " Google software engineer Jeremy Hoffman commented in the Quora thread, saying it was a bug: As a web search query, [-4^(1/4)] is interprete

From the article " Google software engineer Jeremy Hoffman commented in the Quora thread, saying it was a bug: As a web search query, [-4^(1/4)] is interpreted like [-4 "1 4"], as in ”Find me pages which contain a 1 next to a 4, but which do not contain a 4.” This should return zero results, because it is impossible to satisfy both requirements. However, we have uncovered a bug that causes some web pages to “match” these contradictory queries. Since these are the only results that “match” the query, they are the results that get shown. We are working on a bug fix. Thanks to the Quora community for bringing this to our attention."