Man, that MathJAX (I assume) is ugly without JavaScript. '\((P_{predicted} - P_{actual})\)' instead of 'P_predicted - P_actual,' which would look fine. Heck,

Man, that MathJAX (I assume) is ugly without JavaScript. '\((P_{predicted} - P_{actual})\)' instead of 'P_predicted - P_actual,' which would look fine. Heck, with <sub> one could even Do the Right Thing in HTML itself.