Show off your intellect with this unique black t-shirt featuring a clever math-themed design. The shirt sports an array of handwritten-style formulas in white, surrounding a bold "√400" and "Years Old" statement, a playful nod to turning 20. Made from a comfortable-looking cotton blend, this tee is perfect for casual wear, math enthusiasts, or anyone with a witty sense of humor. Wear it to school, a math club meeting, or even a birthday party to make a statement. This eye-catching design is sure to spark conversations and turn heads, making it an excellent addition to your wardrobe or a fun gift for a math-loving friend!