User:Bxshan

Hello, I'm Boxuan!^{[citation needed]}

你好，我是博宣！^{[citation needed]}

${\displaystyle \int udv=uv-\int vdu}$

${\displaystyle f'(x)=\lim _{x\to 0}{\frac {f(x+h)-f(x)}{h}}}$

${\displaystyle f(x)=\int _{a}^{x}f'(t)dt}$

${\displaystyle \int _{a}^{b}f(x)dx=F(b)-F(a)}$