FaLaLaLaLa La La La La! This is a funny Christmas gift that uses a math equation to remind people of Christmas music. FA (LA)8 witty maths formula Equation Christmas Holiday math teacher gift idea in distressed text. This is a math nerd or math teacher or professor gift for christmas time. Perfect for anyone who loves Christmas songs, math and jokes. Be jolly in this great outfit or give it as a present from Santa! Lightweight, Classic fit, Double-needle sleeve and bottom hem