Two-dimensional input forms with built-in evaluation rules.
Any array of expressions represented by a GridBox is interpreted as a list of lists. Even if the GridBox has only one row, the interpretation is still , , ... .
In the form the limits xmin and xmax can be omitted, as can y and w.
Two-dimensional input forms without built-in evaluation rules.
There is no issue of precedence for forms such as and in which operands are effectively spanned by the operator. For forms such as and a left precedence does need to be specified, so such forms are included in the main table of precedences above.