Failed to parse ES Query

Hi While executing an ES query through my java code.
I am getting this exception

Failed to parse query [((("stew" OR "kabobs" OR "filet" OR "brisket" OR "roast" OR "steak" OR "beef" OR "burger") AND asdfqwer3456\\!@#$%dfghtyui%\\^\\\u0026\\() AND
-"vegan")]]; nested: ParseException[Cannot parse \u0027((("stew" OR "kabobs" OR "filet" OR "brisket" OR "roast" OR "steak" OR "beef" OR "burger") AND asdfqwer3456\\!@#$%dfghtyui%\\^\\\u0026\\(
) AND
-"vegan")\u0027: Lexical error at line 1, column 127. Encountered: "\\" (92), after : ""]; nested: TokenMgrError[Lexical error at line 1, column 127. Encountered: "\\" (92), after : ""]

I am very new to ES , don't know what this exception means ,Can someone please explain ?

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