Five Star Gift Ideas

Based on the provided interests of your friend, it seems that they have a unique taste or interest in mathematical expressions and programming concepts. It can be challenging to find a gift that directly correlates with those specific interests, so here are a few thoughtful and creative gift ideas that might resonate with your friend:

1. Personalized Math Equation Jewelry: Consider getting a piece of jewelry, such as a pendant or bracelet, that showcases their favorite equation or mathematical expression. You could have it engraved or custom-made to feature -1' OR 3*2<>(0+5+690-690) in an elegant and stylish way.

2. Coding Classes or Workshops: Since your friend seems to have an interest in programming concepts, enrolling them in coding classes or workshops can be a fantastic gift. It would allow them to develop their skills further and learn new programming languages or techniques.

3. Math Puzzle Set: Challenge your friend's mathematical skills and problem-solving abilities with a set of math puzzles. Look for puzzles that are designed to exercise their logical thinking like Sudoku, Rubik's Cube, or even math-themed jigsaw puzzles.

4. Mathematical Art Prints: Find artistic prints that feature visually captivating representations of mathematical equations or concepts. There are many online platforms or local art stores that offer unique and abstract mathematical art pieces that your friend might appreciate and find inspiring.

5. Customized Math Equation T-Shirt: Design a customized t-shirt with their favorite mathematical expression printed on it. You can create a visually appealing graphic that incorporates -1' OR 3*2<>(0+5+690-690) along with an accompanying design that represents their interests.

6. Mathematical Books or Literature: Consider gifting your friend books that address mathematical concepts in an engaging and accessible way. Look for titles such as "The Joy of x" by Steven Strogatz or "The Mathematical Universe" by Max Tegmark. These books provide interesting insights into the world of mathematics that your friend might find intriguing.

Remember, the most important aspect of gift-giving is thoughtfulness and personalization. Consider your friend's specific interests and preferences, and try to choose a gift that aligns with their personality and passion for mathematics and programming.

Or you can get her/him a star map with an important date you share.