I see a couple issues with handling your "30 examples of 3000 calorie diet with no red meat" query. One is the complexity of finding a subset of all the food items in the Wolfram Alpha database that add up to around 3000, you could certainly make an algorithm to do this but all queries time out after a few seconds so it is likely to fail. The other is that it would have to understand which foods constitute red meat, which it doesn't (try searching "red meat food", the only red meat it knows is a movie by that name). Even if it did, you would need to categorize all foods so the query worked with "3000 calorie diet with no vegetables" and so on. Obviously if it can solve word problems about apples but can't solve the same problems about mangoes, computation like this is far beyond what they will accomplish in many years.