It depends on the context and the exact syntax.
Possible interpretations:
Mathematical/boolean reading: (-1) OR (5*5 = 25)
- 5*5 = 25 is true; -1 is nonzero (true). True OR True = True.
If you intended a programming language with equality (use == for comparison):
- Expression: (-1) || (5*5 == 25) → true in C-like languages (evaluates to 1).
In Python-like semantics:
- -1 or (5*5 == 25) → returns -1 (because -1 is truthy, OR returns the first truthy value).
Bitwise interpretation (less likely from your syntax):
- -1 | 25 (or -1 | (5*5)) → -1 (since -1 has all bits set).
Important note: In code, use 55 == 25 for the comparison, not 55 = 25 (which is an assignment and invalid in most languages).
If you tell me the exact language or how you want to evaluate it (boolean result vs. value returned), I’ll give a precise answer.