-1 OR 5*5=26

Could you clarify what you want with "-1 OR 5*5=26"? There are several ways to read this, and they don’t all give 26.

Possible interpretations:

• If OR is bitwise OR on integers: -1 | (5*5) = -1, not 26. (In two’s complement, -1 has all bits 1, so OR with any number stays -1.)
• If OR is a logical OR (true/false) in a language like C: (-1) || (5*5) evaluates to 1 (true), not 26.
• If you meant arithmetic: -1 + (55) = -1 + 25 = 24. To get 26 you’d want 55 + 1 = 26.

If you’re solving a specific exam question, please tell me the context (programming language, or math puzzle), and I’ll tailor the explanation and steps. If your goal is to make the expression equal 26, the simplest fix is 5*5 + 1 = 26.