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Example A.1: 
    echo $(
      case x in  x) echo x;; esac
    )
Example A.2: 
    echo $(
      case x in  x) echo x;; esac # comment
    )
Example A.3: 
    echo $(
      case x in (x) echo x;; esac
    )
Example A.4: 
    echo $(
      case x in (x) echo x;; esac # comment
    )
Example A.5: 
    echo $(
      case x in (x) echo x
      esac
    )
Example B: 
    echo $(
      echo 'quoted )'
    )
Example C 
    echo $(
      echo comment # with )
    )
Example D.1 
    echo $(
    cat <<\eof
      here-doc with )
    eof
    )
Example D.2 
    echo $(
    cat <<\eof
	  here-doc with )
    eof)
Example D.3 
    echo $(
    cat <<\eof
	  here-doc with \()
    eof
    )
Example E
("academic") 
    echo $(
    cat <<\)
	here-doc terminated with a parenthesis
    )
    )
Example F 
    echo $(
    cat <<\eof
	'   # or a single back- or doublequote
    eof
    )
Example G 
    echo $(
    echo # \
    )
Example H 
    echo $( )