I think using spacing for this can be a little misleading since it can obfuscate priority. To give an extreme example, 1e100 * 1e300/1e300 is infinity, because

I think using spacing for this can be a little misleading since it can obfuscate priority. To give an extreme example, 1e100 * 1e300/1e300 is infinity, because the multiplication is done before the division, but the formatting suggests it's the other way around. It's not too bad in that case but if you were to accidentally group an addition instead the mistake would be harder to spot. I would rather use parentheses all the time to be safe. Still, you make a good point with the space savings. I guess I just find hyphens nice enough that I don't mind the tradeoff :)