M000000082

$$\pi=\frac{5380}{7}\arctan\left(\frac{1}{239}\right)\frac{-3056}{7}\arctan\left(\frac{1}{5827}\right)\frac{-128}{7}\arctan\left(\frac{2}{97059}\right)+\frac{848}{7}\arctan\left(\frac{2}{226043}\right)+\frac{512}{7}\arctan\left(\frac{2}{2513489}\right)+\frac{3056}{7}\arctan\left(\frac{1}{1561886607}\right)+\frac{128}{7}\arctan\left(\frac{1}{14130722757}\right)+\frac{848}{7}\arctan\left(\frac{1}{109027476193}\right)\frac{-848}{7}\arctan\left(\frac{2}{3375905320682366575989}\right)$$