LibreOffice 4.1 Formula editor.

I would like to type in some of the “Logic symbols”, but can’t find all of the one I needed.

Bellow are the one I have found and there is XOR totally missing (or I can’t find it) and some of the symbols are similar in Formula but not the same.

Please copy/paste bellow code into Formula and compare it with the following first column Symbol: List of logic symbols - Wikipedia

"Material implication:" newline p drarrow q newline p toward q " (similar)" newline p supset q newline newline newline "Material equivalence" newline p dlrarrow q newline p equiv q newline (missing single double arrow header) newline newline newline "Negation" newline neg p newline "~"p newline "!"p newline newline newline "Logical conjunction" newline p and q newline p cdot q "," p circ q " (similar)" newline p "&" q newline newline newline "Logical disjunction" newline p or q newline p "+" q newline p parallel q newline newline newline "Exclusive disjunction" newline "(no symbol avaliable)"