Space between operands can be omitted. If any operand is a floating pt or double double precision. Sometimes unintuitive eg. See table 2-5 page 45. Parentheses may be used to form groupings.
Nested parentheses are valid.
The inner most expressions in the parentheses are evaluated first until the expressions of all parentheses have been evaluated. Either from left to right or right to left. Without width specifiers they are left aligned. With width specifiers they are right aligned. 21 Formatted Floating pt.