Unsupported titles/Square brackets

[	U+005B, [ LEFT SQUARE BRACKET

Basic Latin

]	U+005D, ] RIGHT SQUARE BRACKET

Basic Latin

Translingual

[ ]

Encloses a number of changes in quoted text.
1. Paraphrase inserted to clarify context.
  [Luke,] I am your father.
2. Comments about alterations.
  The message said: "Contact them ASAP, their e-mail is [omitted], that's the chance of your life!"
3. Orthographical alterations.
  He said, "[d]on't do it!"
4. (papyrology, epigraphy) Restored writing that was present in the original text but has since become damaged or broken away.
5. See […] for omissions in quoted text.
(linguistics) Encloses a phonetic transcription.
(computing, programming) Encloses optional parameters in syntax help.
DROP TABLE tbl_name [, tbl_name] ...

[ ]

(mathematics) Encloses a mathematical phrase which has increased operator precedence.
$4/(2x+{\textbf {[7+9]}})$
(mathematics) Encloses a polynomial ring.
$\mathbb {C} \cong \mathbb {R} \left[x\right]/\left(x^{2}+1\right)$
(mathematics) Encloses a matrix or vector.
${\begin{bmatrix}1&9&-13\\20&5&-6\end{bmatrix}}$
(mathematics) Singles out a digit or portion of an equation, for commentary.
- 1962, Jack Frohlichstein, Mathematical Fun, Games and Puzzles, Courier Corporation, →ISBN, page 47:
  
  ${\begin{aligned}72\\{\underline {\ \times 11}}\\7\left[9\right]2\\\end{aligned}}$
  
  ${\text{(7 + 2 = 9 from top factor)}}$
(mathematics) denote the least common multiple of two integers.
[4,6]=12
(mathematics) Alternative form of ⌊ ⌋
(programming) In a number of programming languages, encloses each value of an array.
t[1] = "one"

t[2] = "two"
(regular expressions) Matches a single character that is contained within the brackets, including ranges.
[abc] matches "a", "b", or "c"

[a-z] specifies a range which matches any lowercase letter from "a" to "z"

[^abc] matches any character other than "a", "b", or "c".

[^a-z] matches any single character that is not a lowercase letter from "a" to "z"