-1" OR 3*2>5 --

That looks like more of an SQL injection payload than a normal boolean/math expression. I’ll give you a safe, exam-friendly breakdown plus a note on security.

• Pure boolean/math view (ignoring the quotes and comment): 3*2 > 5 evaluates to true (since 6 > 5). If you had a simple OR between two boolean operands and both sides were true, the result would be true.
• The -1" and the trailing -- suggest an attempt to terminate a string and start a SQL comment, which is not a valid boolean expression on its own. In other words, as written it’s not a well-formed expression in typical programming languages; in an SQL context it could be treated as part of an injection payload to manipulate a query.

Important safety note (exam-prep caution):

• This string is a classic example of a potential SQL injection attempt. In real systems, never construct SQL by concatenating user input. Use parameterized queries/prepared statements, proper input validation, and principle of least privilege to defend against such attacks.

If you want, tell me:

• the exact language or environment (SQL, Python, JavaScript, etc.) you’re studying, and
• whether you want a purely boolean-evaluation answer or a discussion of security/defense. I can tailor the explanation accordingly.