Grouping

Every grouping can be (currently) done by parenthesis. So the parenthesis may be both "real" parenthesis and grouping ones.

For example, these parentheses specify nominator of the fraction:

$ (a^2 + b^2)/2 $

Left-right

See official documentation.

If there are two matching braces of any kind, they will be wrapped as lr (left-right) group.

$
{[((a + b)/2) + 1]_0}
$

You can disable it by escaping.

You can also match braces of any kind by using lr directly:

$
lr([a/2, b)) \
lr([a/2, b), size: #150%)
$

Fences

Fences are not matched automatically because of large amount of false-positives.

You can use abs or norm to match them:

$
abs(a + b), norm(a + b), floor(a + b), ceil(a + b), round(a + b)
$