Because the college entrance examination in mathematics tests these eight books.

Therefore, in the few days after Su Yan possessed this body, she basically finished reading through all eight required textbooks plus the past five years' college entrance examination questions.

She took the test paper that Ji Xingyu had just completed and looked at it again.

Then, the Way

"Regarding the knowledge point of sufficient and necessary conditions, the judgment of true propositions and converse propositions, and function analysis, you should go back and read the book yourself."

Ji Xingyu looked at Su Yan with a strange expression.

"Teacher, aren't you going to teach me?"

Su Yan paused, then thought about it carefully.

"These points can be understood by reading the book; they don't need to be taught."

She was very serious; she wasn't joking at all.

Ji Xingyu felt that he might have found a fake teacher.

Then, he pointed to the last big question.

"This question?"

Su Yan lowered her head and looked for a while.

"To sum a sequence, use the method of partial fractions (twice the number of terms)."

Ji Xingyu waited for Su Yan to continue, but found that Su Yan had no intention of continuing.

He asked a question

"And then what?"

"By doing it once, we can get the result, which is -2nn+1."

Ji Xingyu listened to Su Yan's concise words.

He fell silent.

Su Yan looked at him with a puzzled expression, and after a long while...

"Can you remember the expression for the partial fraction decomposition? The formula is a bit long. You can refer to page 83 of the book for a related explanation."

Ji Xingyu did not open his mouth to speak.

The way Su Yan looked at him seemed to say, 'I've made myself perfectly clear; anyone could understand.'

Ji Xingyu opened the book in his hand, held a pen in one hand, and wrote words in the blank space of the paper, making a rustling sound.

After Su Yan finished speaking with Ji Xingyu, she turned her head and met Ji Yan's gaze.

She paused for a moment.

Then she pushed the dried fruit next to her in front of him.

Ji Yan looked at the snacks that had been pushed towards him.

It didn't move.

"dislike?"

Su Yan asked a question.

Ji Yan's lips moved, but he didn't speak for a long time.

She thought for a moment, then reached out and tentatively offered him a few raisins.

Ji Yan looked at the raisins, then lowered his head and silently ate them.

Seeing him eat, Su Yan pushed all the raisins beside her in front of him.

Ten minutes later.

Su Yan looked away from the iPad.

Looking at Ji Yan, I noticed that he hadn't touched the raisins.

Su Yan reached out, peeled open a few pistachios, and handed them over.

He lowered his head and ate obediently.

After she fed him a few times, she discovered that he would eat whenever she fed him.

So, Su Yan watched the live stream while feeding the animals.

It's just like having a pet.

Fortunately, Ji Yan is easy to take care of; he will eat anything given to him and will not refuse anything offered to him.

Another half hour passed.

Ji Yan swallowed the pine nuts in his mouth, and when Su Yan fed him again, he finally spoke.

"You really enjoy watching this?"

After saying that, he silently swallowed the peanut that Su Yan handed him.

"Well enough"

She answered.

In her mind, Little Flower reminded her

"Host, it's time for you to start your live stream."

As a system, its responsibilities, besides issuing tasks to the host and guiding the completion of those tasks, also include functioning as an alarm clock.

Su Yan checked the time, then said to Ji Xingyu

"Alright, that concludes today's tutoring session."

Ji Xingyu paused, his pen still.

I stopped writing.

Now that the tutoring session was over, Su Yan naturally had no reason to stay there any longer.

As she was about to leave, she noticed that Ji Yan remained silent, sitting in his chair and watching her every move.