I suppose it depends on what math you're talking about. If you want to include the probability, then that has no place at the table. I've run the numbers for players who wanted to use Power Attack, Combat Expertise, etc. Do an Excel sheet with columns for enemy ACs at 10, 15, 20, 25, and 30 (or a subset, depending on PC level), blah blah.
In play, you go with your gut. If you need the spreadsheet to feed your gut, do that away from the table. Please don't even bring the spreadsheet to play because you're slowing things down. So, from my perspective, I did get the math right -- at least the only math that should be able to slow down the game.
If you've got someone running specific probabilities at the table, the issue isn't with Power Attack. The issue is with rude players. The same as when the caster doesn't look up his spell until after he's cast it -- or asks the GM what the spell does.