-1" OR 5*5=26 --

It looks like an SQL injection payload rather than a normal boolean expression. A few points:

• The part 5*5=26 is false (since 25 ≠ 26).
• The -- at the end is the start of a SQL comment, which would ignore the rest of the line.
• The -1" seems intended to close a string literal, which would typically cause a syntax error unless the surrounding query is arranged to tolerate it.

As written, this would not reliably yield a true condition and would most likely produce a syntax error in a real database. It’s an example of how attackers try to manipulate SQL queries; it’s not something you should use.

If you’re studying this for an exam, I can help with:

• How SQL injection works at a conceptual level (without actionable exploit steps).
• Defending against it: parameterized queries, input validation, least-privilege accounts, etc.
• Safe practice questions on boolean logic or SQL query safety.

What would you like to focus on?