자주 사용하는 HTML Entity

1. < > : &lt; &gt;
2. ( ) : &lpar; &rpar;
3. { } : &lcub; &rcub;
4. [ ] : &lsqb; &rsqb;
5. "a" : &quot;a&quot;
6. 'b' : &apos;b&apos;
7. a : b : a &colon; b
8. a & b : a &amp; b

more entities
https://dev.w3.org/html5/html-author/charref