Looking at her attentive appearance, Xu Yiyang wanted to get angry and had no choice but to interrupt her by tapping her finger on the table.

"Focus."

"eh?" Jiang Xiaoyu's head hesitated for a moment after his thought was interrupted, and he immediately understood what he meant, "OK, this question involves three formulas. The latter problem is somewhat difficult and requires these formulas.

Jiang Xiaoyu took out a black pen with a yellow pen stick from her pencil box. There was a three-dimensional sponge baby shape on the cover of the pen. She skillfully wrote out the formula on the test paper.

At first she was worried that Xu Yiyang...