You didn't follow the routine at all, did you?

The new book "You Don't Cast Spells According to the Routine" has been released. Thank you for your long wait!

The introduction is as follows:

This is an iron chain made of magic.

You can't break free with brute force.

But it doesn't matter, you are also a wizard, you try to defeat magic with magic.

But you failed. You have to re-examine the iron chain and find that it is made up of letters that emit glimmers, and is linked by many symbols that you can recognize individually, but you can't understand them when combined with everything, and finally form inequalities.

Your intuition tells you that the key to breaking the magic shackles is to solve these inequalities.

But the problem is...

[if...f'(x)≥1/4, f(2)≥0, x≥3...max{f(x)}=?]

"???"

"Whose magic is used like this??"

...

The usual light and flirty style, with many female protagonists, welcome brothers to support!