M000000004

$$\pi=332\arctan\left(\frac{1}{107}\right)+68\arctan\left(\frac{1}{1710}\right)-88\arctan\left(\frac{2}{226043}\right)-136\arctan\left(\frac{2}{2513489}\right)-88\arctan\left(\frac{1}{109027476193}\right)+88\arctan\left(\frac{2}{3375905320682366575989}\right)$$