Seven o'clock in the evening.

Hao Yun, who dragged his tired body back to the bedroom, was surprised to find that there was no one in the bedroom.

But it's no wonder.

Today is the weekend, Zhu Kening has student union activities, Liang Ziyuan seems to have added a guitar club or something music club, Zheng Xueqian should go to the library for self-study if nothing else.

Speaking of which, I completely missed the club orientation......

What kind of club did you seem to have added in your last life?

Frowning and thinking for a while, Hao Yun simply shook his head and didn't think about it for the time being, skillfully climbed the ladder and turned over to the bed, lying flat and entering the system space.

[Inventory: S-Rank Chest*3]

I didn't expect it to be a treasure chest this time.

This kind of scratch ticket that has to scratch the prize again after scratching the prize, how can it feel like a matryoshka doll?

However, the logo of the S-class prefix somewhat comforted Hao Yun, who was physically and mentally exhausted.

S-grade gemstones?

Or some special ability?

Hope is a causal wishing machine with no side effects......

muttered a few words in his heart, and Hao Yun, who was lying on the bed, reached out and poked the icon of the treasure chest.

[Congratulations to the host for getting the "High Mathematics Textbook Full of Professor Lu's Notes"]

Hao Yun: "......? ”

What the hell?!

Before he could react, an ordinary high math book appeared out of thin air and smashed on his head.

"I rely on ......"

The tears of pain were about to be squeezed out, Hao Yun reached out and picked up the culprit who smashed him, and looked at it, almost not frightened by the content inside.

I'll go! It's really full?!

Enduring the pain, he continued to flip through the textbook, and Hao Yun's only feeling was as if he was reading a book from heaven.

If you ignore the part of the notes, just look at the printed font outside the notes, it is similar to the textbook he is using, although the layout is slightly different, but the basic knowledge points are mostly similar.

According to this statement, will there be a line generation of this person in the future? Discrete? Probability theory notes?

Gan!

This guy is too good to pretend!

I vaguely felt that this name was a little familiar, but I couldn't remember where I had heard it, Hao Yun thought with a frown. However, at this moment, a second line of pop-up pop-ups popped up in front of his eyes.

[Branch: Carefully study and deeply understand the content in the notes, and independently complete 100 after-class reflection questions. 】

[Reward: Math Attribute +4]

Boy......

Directly add 4 attribute points?!

Originally, I wanted to complain, but seeing this clearly priced task reward, Hao Yun couldn't say anything to complain.

Although he has no special interest in mathematics, and even rejected it in his previous life because of some reasons that he can't remember clearly, he certainly won't refuse things that can improve his ability.

It's just a hundred questions.

Take your time at most.

Taking his gaze away from this strange high math textbook, Hao Yun continued to look at the remaining two treasure chests.

This time, he understood that the treasure chest should be something that could be seen and touched, and the tasks directly rewarded things that only he could see.

Do you want to keep scratching the lottery?

The expression on Hao Yun's face was a little hesitant.

If it's a book, it's fine, at most it's a high point under the pillow. If this is a big guy, such as "so-and-so's piano" or something, it is not as simple as explaining whether it is good or not, but it is not life-threatening......

At this time, footsteps were heard outside the dormitory.

Hearing the sound of the door lock turning, Hao Yun was excited, and reflexively stuffed the book under the pillow and hid it, while lying flat on the bed. The whole set of movements is completely instinctive, flowing smoothly, and done in one go.

At almost the same time, Zheng Xueqian, who was carrying a shoulder bag, and Liang Ziyuan, who was carrying a guitar, walked in from outside.

Looking at Hao Yun lying on the bed, Zheng Xueqian smiled and said hello.

"Yo, why did you come back so early today?"

Hearing Lao Zheng's voice, Hao Yun responded weakly.

"I'm tired, come back and lie down for a while."

Tired?

Zheng Xueqian's heart suddenly tightened.

I'm afraid it's been a whole day of studying......

Especially when he first came in, he faintly heard the sound of the pages rolling by.

Could it be that this guy is studying in bed?

The more he thought about it, the more he felt that it was possible, and he was instantly more nervous after playing 2048 in the library for a few hours.

Liang Ziyuan glanced at the upper bunk and saw that this guy didn't seem to be joking, and finally put down the guitar that had just rested on his knees.

Although he considers himself to be a more self-conscious person who doesn't care much about other people's affairs, this does not mean that he does not care about other people's feelings at all.

He can still tell the difference between the roommates' "jokingly saying that I can't stand it" and "I really can't stand it physiologically".

When you're tired, get some rest.

Without saying a word, humming softly in an unknown minor key, he took out his yellowed sketchbook and began to write and draw on it some difficult staves and elusive sentences.

Zheng Xueqian, who was on the other side, hesitated for a long time on the question of whether to disturb Hao Yun's sleep, and finally couldn't help but ask.

"Brother Yun."

It's rare that the Ziyuan brothers don't play the piano indiscriminately today, and Hao Yun, who is extremely comfortable, replied lazily.

"Your dad is here, let go of a fart."

"Grass! Believe it or not, I threw Lao Zhu's socks on your bed. ”

As soon as he heard this, Hao Yun was immediately happy.

"What? Do you want to help Lao Zhu collect socks? ”

Probably disgusted by the imaginary image, a retching sound came from under the bed.

After a long while, Zheng Xueqian, who had recovered his strength, put on a serious tone and continued.

"Okay, okay, don't talk nonsense with you, let's be serious."

"You say."

"Did you do the reflection question assigned in the last high math class?"

Food for thought?

And what's going on?

Hao Yun frowned.

“…… High math thinking questions? ”

"That's right, it's Lao Li's class, didn't he leave a reflection question on the blackboard at the end?" Zheng Xueqian said bitterly, "I didn't finish it all afternoon in the library. ”

"Oh, that's what you said."

Hao Yun was vaguely impressed.

At that time, Zhu Kening also went to the toilet to give himself a piece of paper, and he had been distracted in that class and didn't listen too clearly, but the later thinking question was still copied in the draft book.

But it seemed simple for him to remember......

There are only two or three letters.

Zheng Xueqian couldn't cry and laughed: "Don't be light, have you written it?" ”

Hao Yun replied honestly.

"Nope."

Zheng Xueqian: "......"

"What's the hurry," Liang Ziyuan glanced at Zheng Xueqian and said calmly, "The next class is Tuesday, and I will have time to write tomorrow." ”

Zheng Xueqian smiled bitterly and said, "You don't know how difficult that question is." ”

Liang Ziyuan: "I don't feel it. ”

Zheng Xueqian: "Where have you written?" ”

Liang Ziyuan: "Solution." ”

Zheng Xueqian: "......"

Not wanting to talk nonsense with this troublesome guy, Liang Ziyuan impatiently looked away, looked up at the upper bunk, and shifted the focus of the topic.

"Brother Yun, do you sleep, if you don't sleep, I'll practice for a while?"

"I slept, good night, thank you!"

quickly closed the bed curtain, but Hao Yun did not fall asleep immediately, but turned on the night light in the bed curtain and took out the "advanced math textbook full of Professor Lu's notes".

With a hint of curiosity, he turned the title page of the book.

I saw that the part with the name written on it had been erased, and only a line of aphorism written by the author himself remained-

Science changes the world, and mathematics changes science. 】

Hao Yun: "......"

All right.

It doesn't matter if mathematics changes the world or not.

Single-wheel loading this piece, I, Hao Yun, would like to call him the strongest!