However, Long Yanting wrote out all the steps, very detailed, almost a whole blackboard......

Therefore, this question is quite difficult.

The math teacher was a little unhappy at the beginning, but gradually looked at him and nodded frequently with a smile.

"Teacher, I'm done...

Chapter 227 of "Encountering the Narrow Road Again" Chapter 227 The "Moon" (9) is hitting in the hand, please wait a while,

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