Rule 12.1 - are extra parentheses not compliant?

[pkruk]

However, do not add too many parentheses so as to clutter the code and make it unreadable.

Does it means that the "not required" parentheses below are a violation of this rule? If not, is there a case where too many parentheses is a violation to this rule?

Code:

x = a + b; /* acceptable */
x = (a + b); /* () not required */