Today's math exam results are already known. What idioms are there behind?

From the beginning to the end [dà o tó u zh and w ě i]

Basic explanation

You know the result at the beginning. Describe quick thinking and strong understanding.

tidy

Zhuzi School Volume 49: "Only a saint knows the end of the road, and when he goes to school, he will arrive. If he teaches, he must follow his orders. "

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