M000000053

$$\pi=1416\arctan\left(\frac{1}{580}\right)+908\arctan\left(\frac{1}{1023}\right)-684\arctan\left(\frac{1}{1710}\right)+1240\arctan\left(\frac{1}{5832}\right)-48\arctan\left(\frac{2}{2513489}\right)+332\arctan\left(\frac{1}{6826318}\right)$$