M000000074

$$\pi=332\arctan\left(\frac{1}{239}\right)+1328\arctan\left(\frac{1}{580}\right)-928\arctan\left(\frac{1}{1710}\right)+576\arctan\left(\frac{1}{105218}\right)-48\arctan\left(\frac{2}{2513489}\right)+576\arctan\left(\frac{1}{7167807}\right)$$