-1 OR 5*5=25 --

Here are the common interpretations. The exact result depends on the language or how you’re reading the expression.

• Logical/Boolean interpretation (true/false): -1 is treated as true (nonzero), and 5*5=25 is true. True OR True = True. Result often shown as 1 (true).

• C/JavaScript/Python-style logical OR (short-circuit, returning a value): -1 is truthy, so the first operand makes the whole expression true, and the language may return -1 (not a boolean) as the result. So result could be -1.

• Bitwise interpretation (if you meant -1 | (55==25) with 1 for true): 55==25 is true -> 1. Then -1 | 1 equals -1 (since -1 has all bits 1).

If you tell me which language or whether you want a boolean result or a numeric result, I can give a precise answer.