为什么我markdown里的数学公式全崩了？？？
目录
https://www.diyifanwen.com/fanwen/dangyuanxindetihui/2665516.htm
https://www.diyifanwen.com/fanwen/dangyuanxindetihui/2665516.htm
https://www.diyifanwen.com/fanwen/dangkexindetihui/2661093.htm
https://zhidao.baidu.com/question/585243762.html
try a try
\(\sum_{d|n} \mu(d) = [n==1]\)
\(x\)
ac is ok
\[\sum_{d|n} \phi(d) = n\]
#include<bits/stdc++.h>
int main() {
std::cout << "Hello!\n";
}
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