This test passes if the depth and height of braces match the maximum depth and height of its siblings.

{

{

{

{
x	y	z	x	y	z	x	y	z	x	y	z	x	y	z

{
1
2
3
4
-
5
6
*
1
2
3
4
5
6
7
8
9
10
11
+
7
8
9
10
/
1
2
1
2
3
4
5
5
6

{
|
}

{
p
{
|


PASS symmetric stretching
PASS large depth
PASS large height
PASS mtable
PASS several siblings with different heights/depths
PASS testing several operators in one mrow
PASS testing with non-stretchy mo