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Latex Underline, Underbrace, Overline, and Overbrace
Syntax $latex \name{commands}$$
where name is underline, underbrace, overline, or overbrace,

Description
XML dependently interpret the specified command list with the following additional output.
name Additional Output
underline a line below stretched to match size
underbrace a brace below stretched to match size
overline a line above stretched to match size
overbrace a brace above stretched to match size

Example
name commands Output
underline x  \underline{x}  
underbrace x  \underbrace{x} 
overline x  \overline{x}   
overbrace x  \overbrace{x}  
   
name commands Output
underline x+y  \underline{x+y}  
underbrace x+y  \underbrace{x+y} 
overline x+y  \overline{x+y}   
overbrace x+y  \overbrace{x+y}  

Input File: latex/under_over.omh