User:Bxshan

ßoxuan
Hello, I'm Boxuan!

你好，我是博宣！

Hola, soy Boxuan!

Bonjour, je suis Boxuan!

Salvete, Boxuan sum!

$$\int udv=uv-\int vdu$$

$$f'(x) = \lim_{x\to0} \frac {f(x+h)-f(x)}{h}$$

$$f(x)=\int_{a}^{x}f'(t)dt$$

$$\int_{a}^{b}f(x)dx=F(b)-F(a)$$