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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script> function f(n){ let sum=0; let m=1 for (i=1;i<=n;i++){ m=m*i; sum+=m; }return sum } v=f(3); document.write(v) </script> </head> <body> </body> </html>
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