bad paren format in math

[QuadnucYard]

In the cases below, I would rather not format it than wrap the content in parentheses/braces, especially when I already wrap in the cases, in which the contents of cases should not affect formatting before.

$
  f(
    x
  ) = cases(
    "a very very very very very very very long case",
    "b very very very very very very very long case".
  )
$
$
  f(
    x
  ) = abs("aaaaaaaaaaa very very very very very very very very very very very very very very very very very long arg")
$
$
  (
    a + b
  ) = abs("aaaaaaaa very very very very very very very very very very very very very very very very very long arg")
$
$
  f[
    x
  ] = abs("aaaaaaaaaaa very very very very very very very very very very very very very very very very very long arg")
$
$
  f[
    x
  ] = cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos
$
$
  f{
    x
  } = cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos + cos
$

Suggested format result (not considering binop line breaks):

$
  f(x) = cases(
    "a very very very very very very very long case",
    "b very very very very very very very long case".
  )
$
$
  f(x) = abs(
    "aaaaaaaaaaa very very very very very very very very very very very very very very very very very long arg"
  )
$
$
  (a + b) = abs(
    "aaaaaaaa very very very very very very very very very very very very very very very very very long arg"
  )
$
$
  f[x] = abs(
    "aaaaaaaaaaa very very very very very very very very very very very very very very very very very long arg"
  )
$

[Enter-tainer]

This is indeed hard to handle. The tricky part is that whether to break or not is determined by the semantics of the equation.

For example, we may disable line breaking for f(x) in f(x) = long long equation, but we may want f((x+y)-(x-y)) = long long equation to be breaked into multiple lines. Would you like proposing a rule to determine whether to break a MathDelimited into multiple lines or not?