M000000096

$$\pi=\frac{332}{7}\arctan\left(\frac{1}{15}\right)\frac{-188}{7}\arctan\left(\frac{1}{1710}\right)+\frac{48}{7}\arctan\left(\frac{1}{103697}\right)\frac{-4}{7}\arctan\left(\frac{2}{2513489}\right)+\frac{48}{7}\arctan\left(\frac{2}{18280007883}\right)$$