School belle, please respect yourself: I am a serious person.

Lu Xun once said that time is like a wild donkey that has escaped from the reins, slipping away from the crack in the door.

When Lu Li opened his hazy sleepy eyes, glanced at his mobile phone, and found that the time had come to Friday, he couldn't help but sigh that what Mr. Lu Xun said was really right.

It's been two days since he drove back from Gangneung.

In the past two days, he has almost eaten and slept, slept and eaten, and he doesn't even want to turn on the computer.

He vowed never to drive such a long car again.

It's really exhausting.

If he hadn't been woken up by the phone, he would have wanted to go back to sleep.

He glanced at the number he hadn't answered, it was his roommate.

"What's wrong?" He asked, retorting.

"Brother Lu, the math teacher has been calling names for four days in a row, and in the past three days, you are the only one who hasn't been there. He said it yesterday, and he named him today, and if you don't go today, he will report to the school for demerit. The voice on the other end of the phone was a little urgent.

Lu Li: "Can you help me answer?"

"I can't answer it, Brother Lu. Yesterday and the day before yesterday, he named those who had not been before, and all those who had not been there called the podium to look at the students' photos one by one.

Lu Li: "... Okay, I got it.

After hanging up the phone, Lu Li fell into deep thought.

I'm a billionaire now, and I still have a system, so do I want to go or not?

After thinking about it for a while, he decided to go.

After all, I'm still a student.

Moreover, to be honest, the school rules of Tianjing University are still quite strict, and if this kind of thing is really investigated, it will be recorded as a major demerit at least and directly withdrawn from the university at worst.

To be honest, Lu Li couldn't imagine what he should do if he was dropped out of school.

Rent a boyfriend on the same day?

Come on, Nan Jinping and Lin Xiaowan, the two customers, are about to torture him crazy.

Forget it, go for it.

Lu Li reluctantly got up from the bed, wiped his face briefly, put on a few clothes, and ran to the classroom.

Soon after.

The class bell rings.

Looking at the full seats in the classroom, the teacher on the podium nodded in satisfaction, "yes, that's what you should do." It's not right for you to skip class in your sophomore year. Okay, now open the textbook, let's talk about Fourier series, first, let's review the last lesson..."

Lu Li:....

Didn't you say roll call!

Why don't you order it!

me?

Forget it, I didn't come to class for roll call, although I don't understand, but let's listen.

It's just that, listening to it, Lu Li feels that something is wrong.

Those mathematical formulas that are like a book in the sky, and the formulas and theorems that he knows every word but can't understand when they are combined, have become extremely simple at this moment?

Oh, so that's how Fourier series are derived?

Doesn't that seem easy?

Is the gap between the Fourier series and Taylor's formula like this?

How can Fourier series still be used like this?

It's kind of interesting...

Lu Li listened, the pen in his hand was scribbling on the paper, and at the same time he couldn't stop nodding.

The person sitting next to him looked at Lu Li and was speechless in his heart.

They're all sitting in the last row, what are you pretending?

Who doesn't know who it is?

To whom do you nod your head in this void?

Cut.

The man snorted disdainfully, then continued to look down at the phone tucked away in the book.

"Do you understand this example?" The teacher on the podium puts the chalk down and looks at the students.

The students in the first and second rows nodded frantically.

The students in the third to fifth rows were stunned for a moment, then nodded.

The students in the fifth to eleventh rows had bitter faces, but they nodded when they saw the people in front of them, and in the end, they could only nod.

The students in the back of the eleventh row raised their heads as if they had just woken up from a dream, and then looked at the people in front of them and nodded, and nodded mechanically.

"You get it, huh? Well, in the following Xi question, I will select a student to come up and answer it. The teacher nodded in satisfaction, and then flipped through the roster.

Except for the students in the first and second rows, everyone immediately buried their heads deep in the book, for fear that they would become the unlucky guy.

"I'll look for it," the teacher flipped through the roster and said casually, "Lu Li, please come up and answer this question." He

just said it casually.

Because, he didn't want to waste time alone for the student named Lu Li to take a roll call.

So, he just said it casually.

He had already decided that Lu Li would not come, so he continued to flip through the roster.

However, just as he was about to open his mouth to continue selecting the next student, a voice suddenly appeared in the classroom, "Arrived".

The teacher suddenly raised his head and found that a boy sitting in the back row had actually stood up?

Lu Li is here?

The teacher was a little incredulous.

Equally unbelievable, there is also Nan Jinping.

This voice, she is all too familiar.

It was her haunting voice.

She turned her head suddenly, and then saw the figure that was firmly imprinted in her heart.

Her eyes suddenly glistened with tears.

"Found you," she muttered, and then, remembering something, suddenly buried her head in the textbook.

She was afraid that if Lu Li saw him, he would run away again.

So, she decided to go over and block him directly when there was a small recess!

The teacher looked at Lu Li, who walked up to the stage, and didn't say anything, just nodded and handed him the chalk.

As a teacher, he would never make such a sarcastic remark in public.

He is professional and will never do anything that hurts the self-esteem of students.

It's just that he's a little curious.

Because, when Lu Li took the chalk in his hand, his expression was extremely indifferent.

It was a kind of indifference.

"Could it be that this student really will?" The teacher muttered to himself.

He could see the scene just now clearly, the Fourier series was a very difficult thing.

What's more, this Lu Li is sitting in the last row.

Moreover, judging from the aura on his body, he is obviously the kind of rich second generation with a high level of cultivation.

Isn't this kind of rich second generation generally gold-plated?

The teacher looked at the blackboard with a puzzled look.

The more I looked, the more frightened I became.

Because, Lu Li, he actually wrote on the blackboard like a flowing cloud!

And, that's not all.

In the beginning, he did use the same method as the example problem.

But, halfway through writing, he began to change.

He didn't even follow the most basic, universal, but also the most computationally intensive method in the example problems.

Instead, after proving the Lebegus productable, the McLaughlin method of the pending coefficient was introduced, and finally, the Cauchy formula was used to solve this problem!

The teacher was stupid.

Among these contents, even the simplest Cauchy integral formula and McLaughlin's pending coefficient method are only covered in the "Mathematical Analysis" course for mathematics majors, and they are a headache for countless people.

Not to mention that this student even proved that Lebegus is accumulative!

He's a sophomore???

His parents were math professors at which university!!

No wonder, no wonder I had to come to my own class.

There's no need for people to come to class!

"Teacher, it's done." Lu Li put the chalk on the podium and turned his head to look at the teacher.

"Well, Lu Li, right?" The teacher pondered and spoke.

"Well, I'm sorry teacher, I didn't come to your class because I had something to do this week, I..."

the teacher raised his hand to interrupt Lu Li's words, "I can understand, but try to come to my class, otherwise others will think that you have any opinions about me." In the future, if you have something to do, you can ask someone to tell me... Forget it, no need, in the future, my class, if you have time, you can come, if you don't have time, forget it, just busy with you. "

Lu Li: ...??

Students in the audience: ??????

Is this still their old-fashioned teacher???

What does this mean???

Tell a student that if you don't have time, you won't have to take my class???

What the hell??

Moreover, what does it mean that Lu Li doesn't come to his class, which will make others think that he has an opinion about him??

Also, on the blackboard, what is written there?????

Is this really something that a human can write?

Is this a human thing?