M000000080

$$\pi=332\arctan\left(\frac{1}{239}\right)+1328\arctan\left(\frac{1}{580}\right)-928\arctan\left(\frac{1}{1710}\right)+576\arctan\left(\frac{1}{110443}\right)+528\arctan\left(\frac{2}{2513489}\right)-576\arctan\left(\frac{1}{4841182}\right)$$