Yea it is
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its like a number on top of a number. sort of like a fraction... the dots are numbers and the line is like the fraction bar.
Grouping symbols? parenthesis (), brackets [], the fraction line itself if written horizontally (not at a slant), any radical (square or cube root etc.)
The horizontal bar in a fraction is called a vinculum or, informally, a "fraction bar".
12 parts are in a fraction bar
how do I label the first part of the fraction bar with the correct unit fraction