M000000120

$$\pi=332\arctan\left(\frac{1}{239}\right)+752\arctan\left(\frac{1}{580}\right)+800\arctan\left(\frac{1}{1710}\right)-576\arctan\left(\frac{1}{91093}\right)-576\arctan\left(\frac{1}{103862}\right)-48\arctan\left(\frac{2}{2513489}\right)$$