RULE XVIIISIGNS AND SYMBOLS OF GROUPING
Parentheses (round brackets) Left(
 Left Enlarged,(
 Right)
 Right Enlarged,)
 Left@(
 Left Enlarged@,(
 Right@)
 Right Enlarged@,)
 Boldface Left_@(
 Boldface Right_@)
 Left.(
 Left Enlarged.,(
 Right.)
 Right Enlarged.,)
 Single\
 Single Enlarged,\
 Double\\
 Double Enlarged,\,\
 Boldface Single_\
 Boldface Double_\_\
 Left..(
 Left Enlarged..,(
 Right..)
 Right Enlarged..,)
 Left@_(
 Left Enlarged@_,(
 Right@_)
 Right Enlarged@_,)
 Left._(
 Left Enlarged._,(
 Right._)
 Right Enlarged._,)
 Upper Left@^(
 Upper Left Enlarged@^,(
 Upper Right@^)
 Upper Right Enlarged@^,)
 Lower Left@;(
 Lower Left Enlarged@;,(
 Lower Right@;)
 Lower Right Enlarged@;,)
 Left,'
 Left Enlarged,'(
 Right,'
 Right Enlarged,')
§120. Symbols of Grouping:
a. The grouping symbols listed above must be used everywhere in the transcription, whether for literary or mathematical purposes. The grouping symbols of English Braille must never be used except to enclose literary material on title pages. If a grouping sign occurs which is not listed above, then in the spirit of the Code, the transcriber must devise a symbol whose first component is ( for the opening grouping symbol and must use the same device but with last component ) for the closing symbol.
verbose 
leftparenthesis s period a period s period equals s period a period s period rightparenthesis 

verbose 
leftparenthesis x hyphen intercept rightparenthesis comma leftparenthesis x y hyphen plane rightparenthesis 

verbose 
leftparenthesis r a t e rightparenthesis cross leftparenthesis t i m e rightparenthesis equals leftparenthesis d i s t a n c e rightparenthesis 

§122. Boldface Brackets: Boldface brackets are often used to designate the integer function.
verbose 
If x equals 3 point 5 comma then leftfloor x rightfloor equals 3 and leftceiling x rightceiling equals 4 period 

verbose 
leftcornerbracket a 1 space a 2 space ellipsis space a Subscript
n Baseline
rightcornerbracket 

a. Double boldface vertical bars are usually read as the norm of.
b. Single vertical bars are often read as the absolute value of, but are used for other purposes.
verbose 
StartLayout
1st Row StartExtended leftbrace
1st Column
x plus y equals 2 StartExtended rightbrace
2nd Row End leftbrace
1st Column
x minus y equals 0 End rightbrace
EndLayout


verbose 
Start 2 By 2 Determinant
1st Row
1st Column
a 2nd Column
b 2nd Row
1st Column
c 2nd Column
d EndDeterminant
equals a d minus b c period 

verbose 
leftparenthesis StartFraction
x plus y Over
u plus v EndFraction
rightparenthesis Superscript
2 

verbose 
Integral StartFraction
f leftparenthesis x rightparenthesis space d x Over
leftparenthesis x minus t rightparenthesis Superscript
n Baseline
EndFraction


§128. Spacing with Symbols of Grouping: