Adding, subtracting, multiplying, and dividing have never found spots on my list of favorite things, but a great pattern makes me appreciate the agonizing semesters of geometry classes.
Blouse: Trina Turk (Mel & Mimi); Skirt: Trina Turk (Mel & Mimi); Tights: Hue; Shoes: Christian Louboutin; Necklace: Anthropologie (old); Sunglasses: Kate Spade (similar here)