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... ose eyes were bloodshot, was scratching his head, thinking about something.
"Three-dimensional method, what's the problem?" In front of Sergey, there was a lot of draft paper filled with formulas, and beside the draft paper was the graphing calculator. As for his feet, there are also countless **** of waste paper.
"Sergey, my friend, what's wrong with you?" Qin Tao and Nicholas walked in, and they were very surprised when they saw Sergey like this.
Sergey turned his ...
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