I think the lead-up works better now as well.
I'm OK with dropping the second sentence with the order of operations -- it was included for those who may not be familiar with the concept. Given that its an example -- it should be OK to delete this.
I made another attempt at the example to simplify the explanation. I think this one works OK. I agree it's nice to have a little bit of explanation/example for those unfamiliar with the concept.