Agreed. I kept holding out hope that there was some clever solution I just couldn't see, but no, the only sane solution is to do exactly what you did and write

Agreed. I kept holding out hope that there was some clever solution I just couldn't see, but no, the only sane solution is to do exactly what you did and write a script. What's the point in making students slog through endlessly plugging numbers into a weirdly formatted equation?