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 semantics 
leftparenthesis s period a period s period equals s period a period s period rightparenthesis 

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

verbose semantics 
leftparenthesis rate rightparenthesis times leftparenthesis time rightparenthesis equals leftparenthesis distance rightparenthesis 

verbose semantics 
leftparenthesis x plus y rightparenthesis leftparenthesis x minus y rightparenthesis 

§122. Boldface Brackets: Boldface brackets are often used to designate the integer function.
verbose semantics 
If x equals 3.5 comma then leftfloor x rightfloor equals 3 and leftceiling x rightceiling equals 4 period 

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 semantics 
StartLayout Enlarged leftbrace
1st Row
x plus y equals 2
2nd Row
x minus y equals 0
Enlarged rightbrace EndLayout


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

verbose semantics 
y equals StartLayout Enlarged leftbracket
1st Row
x comma if x lessthanorequalto 0
2nd Row
0 comma if x greaterthan 0 point
EndLayout


verbose semantics 
Start 3 By 3 Matrix
1st Row
1
0
0 2nd Row
0
1
0 3rd Row
0
0
1 EndMatrix
equals Upper
I period 

verbose semantics 
leftparenthesis StartFraction
x plus y Over
u plus v EndFraction
rightparenthesis squared 

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


§128. Spacing with Symbols of Grouping:
verbose semantics 
StartLayout Enlarged leftbrace
1st Row
2 x plus y equals 9
2nd Row
x minus 3 y equals 11
Enlarged rightbrace EndLayout

