User:Henry in out

Hello, I am henry_in_out! Although Im not very good at mathematics, but I still love it! Kinda good at enumerating. Hope you enjoy my solutions! If you find any question about solution just email henry_in_out@163.com

Thank you so much!

I am also an osu!mania player, my osu!mania name is HowToPlaySV

Also my Bilibili Account -> henry_in_out

Trying to Learn LaTeX and Manim now...