The Scholomance is trying to kill him in a much more metaphorical sense than usual. 

Tomonori is so excited about this class! Maybe he can learn to (one day, if he graduates) build a wizard tower!!!

-Tomonori has significantly more mixed feelings about this class now that he sees who's in it. He looks for a seat- near Nie Hauisang? Where Jiang Cheng can't see him? Please?

The mixed feelings are NOT mutual because Jiang Cheng's feeling is UNMIXED ANGER.

This is, objectively, the best possible math class.

...with... okay so not the most awkward possible set of classmates but like, it's up there. She picks a seat near Jiang Cheng, she thinks she can replicate her success earlier, and smiles over at him in greeting.

Hello, adorable lab boyfriend! Nie Huaisang will totally draw your pictures for you.

"Hello," he snarls at Ayako.

Tomonori appreciates this! He does not look at Jiang Cheng at all!

"Hello," he says, quietly, to his new friend, so that nobody tries to bring a whip out in the middle of class (???).

Jada is excited for this class! She's good at math. Wow, that guy looks pissed off, she sits away from him.

No one designed these seats for cuddling. It's like they aren't paying attention to Nie Huaisang's needs at all.

"Hi," she says, and determinedly does not look at Tomonori and Huaisang, because that would make things worse.

"I don't know how I got in here. I'm supposed to be in real math."

"I'm sure-"

-he starts, but doesn't finish.

"Um. I'm sorry."

"...aren't you also in a calculus class, is that not real math?"

Also this isn't exactly fake math, but that isn't the point. 

"My brother is in two real math classes."

Maybe his brother spends less time waving his whip around and more time studying, Tomonori doesn't say.

He looks for a textbook to read; he'll need to study as much as possible if he has to do Nie Huaisang's work in this class, too.

Okay, so, what if, instead of being in this class, Wen Ning were in literally any other class. 

This is a suggestion that Wen Ning is way too meek to actually mention.

"Oh, Tomonori, I can be helpful in this class! I know so much about art."

In Ayako's defense she did not know the class roster was going to be like this when she signed them up for the class and the actual work is something she's very good at.

"...right. Well, most freshmen don't take calculus at all, for whatever that's worth." 

"Most freshmen aren't trying to take real math because taking real math gets you killed."

Then why do you want to be in two real math classes so badly, she doesn't say. She does find her textbook and open it.

...and, once again, she zero percent regrets her choices, this is objectively the best possible math class.

I KNOW RIGHT

...Tomonori sits there, trying to puzzle this out. So there's a number in nature that just arises when you...hmm. Smaller and smaller square, squares inside squares...it's really not his fault his mind immediately goes back to the tower, the image of it that he has in his head- it's only natural!

"Can you draw the tower," he whispers to Nie Huaisang. "I mean- a tower. A skyscraper like they have in some of the biggest enclaves?"