Hello! First time poster on physicsforums, and I've had a question that I thought would be best addressed here. I'm going to be entering college as a freshman come fall, and I have a pretty decent background in math as well as a strong appreciation for elegant proofs and solutions. So when I read and learned about string theory, it was very interesting and appealing conceptually, but people always lambasted it for being based purely on elegant mathematics instead of empirical evidence, like science was supposed to be (in fact, that's the reason why Richard Feynman wouldn't endorse it). However, the books I read never demonstrated any examples of these beautiful and elegant mathematics. Is there anyone here who can provide some elegant equations or examples that could shed light on the beauty of string theory? Thanks a lot! P.S. My level is only solid up through all of single variable calc, with some dabbling in random fields, but feel free to put in higher level examples if need be (I hear the math in string theory is exceptionally difficult).