Fill in the numbers in the box below, so that the nine numbers 1 to 9 in each formula appear once. 5796 ^ ^ ^ ^ ^ ^ ^ ^ = ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ = ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

Fill in the numbers in the box below, so that the nine numbers 1 to 9 in each formula appear once. 5796 ^ ^ ^ ^ ^ ^ ^ ^ = ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ = ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

(1) So the answer is: 4, 2, 1, 3, 8, 2, 7, 1, 9, 8

A very interesting and challenging math problem
It's like this:
A person to eat, breakfast, Chinese dinner. Ingredients are rice, steamed bread, pancakes
Then:
How many ways to eat? What intuitive algorithm?
For example: eat rice, steamed bread, Shaobing for breakfast, nothing for lunch and dinner
Or: steamed bread for breakfast, rice for Chinese food, sentry for dinner

There are four cases
1： Eat all three meals
N=3×3×3+3×3×3+1×1×1=55
2： Eat only two meals (divided into eat the same, eat two, eat three)
N=3×（3×3+3×3+1×1）=57
3、 Only one meal (divided into one meal, two meals and three meals)
N=3×（3+3+1）=21
4、 Don't eat
N=1
Finally: n = 55 + 57 + 21 + 1 = 134 species

There are five stations a, B, C, D and E on a single track railway. The distance between them is 48 km from a to B, 40 km from B to C, 10 km from C to D, and 70 km from D to E. train a and B leave from a and e respectively. Train a runs for 4 minutes first, 60 km per hour, and train B runs for 50 km per hour. The two trains can only stop at the station and give way to each other, In order to minimize the waiting time, how long does the first train have to stop,

1. Car a goes ahead for 4 minutes, 60 kilometers per hour, 4 minutes / 60 kilometers per hour * 60 minutes = 4 kilometers. B has not gone yet, and car a has started from a for 4 kilometers. 2. If we meet at the same time, we should set the meeting time as X hours, and the distance of A-E is 48 + 40 + 10 + 70 = 168 kilometers, because