Five Star Gift Ideas

It's wonderful that you are looking for a meaningful anniversary gift for your girlfriend. Based on her liking of the mathematical expression -1 OR 3*2>(0+5+171-171), it seems like she has a strong interest in mathematics and logic.

Here are a few gift ideas that you can consider:

1. Mathematical Puzzle Set: Since she enjoys mathematics and logical expressions, she might appreciate a puzzle set that includes various mathematical brain teasers and logic puzzles. This will not only keep her entertained but also allow her to further explore her passion for math.

2. Math-themed Jewelry: Consider gifting her a piece of jewelry that incorporates mathematical symbols or equations. For example, you can find necklaces or bracelets with pendants in the shape of mathematical symbols like infinity (∞) or the mathematical constant pi (π). This will be a symbol of her love for mathematics and a unique accessory to wear.

3. Math Books: If she loves diving deep into math concepts, consider gifting her some intriguing math books. Look for books that explore mathematical puzzles, paradoxes, or the history of mathematics. You can also consider books that discuss popular mathematical theories or biographies of famous mathematicians.

4. Customized Calculator: Since she enjoys mathematical expressions, consider gifting her a customized calculator. There are calculators available that allow you to personalize the appearance of the calculator with a custom message or design. This will not only be a useful tool for her calculations but also a special keepsake.

5. Math Artwork: If she appreciates art, you can consider gifting her a piece of math-inspired artwork. Look for mathematical posters or prints that showcase beautiful equations or mathematical patterns. This will be a unique and visually appealing addition to her living space.

6. Math-related Experience: Consider surprising her with an experience that combines her love for mathematics and her interests. Look for math-related events, such as math conferences or seminars, where she can meet like-minded individuals and learn more about her favorite subject.

Remember, the key to a meaningful gift is to understand and appreciate her interests. By selecting a gift that aligns with her passion for mathematics, you are showing her that you truly value her and her interests.

Or you can get her a star map with the date of your anniversary.