M000000109

$$\pi=332\arctan\left(\frac{1}{185}\right)+664\arctan\left(\frac{1}{443}\right)-264\arctan\left(\frac{1}{1710}\right)+244\arctan\left(\frac{1}{105218}\right)+284\arctan\left(\frac{2}{2513489}\right)-88\arctan\left(\frac{1}{7167807}\right)$$