puniko,
{displaystyle pi ={frac {4}{1}}-{frac {4}{3}}+{frac {4}{5}}-{frac {4}{7}}+{frac {4}{9}}-{frac {4}{11}}+{frac {4}{13}}-cdots }
puniko,
{displaystyle pi ={frac {4}{1}}-{frac {4}{3}}+{frac {4}{5}}-{frac {4}{7}}+{frac {4}{9}}-{frac {4}{11}}+{frac {4}{13}}-cdots }