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Latex Testing: 2n=i=0n(ni)2^n=\sum_{i=0}^{n} \binom{n}{i}

LaTeX\LaTeX TeX\TeX KaTeX\KaTeX

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#include<bits/stdc++.h>
using namespace std;
using pll=pair<long long,long long>;
class segtree
{
public:
#define nd node[now]
#define ndl node[now*2]
#define ndr node[now*2+1]
};
struct node
{
long long x,y;
};
int main()
{

return 0;
}

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