M000000054

$$\pi=40472\arctan\left(\frac{1}{34208}\right)+91704\arctan\left(\frac{1}{44179}\right)-27056\arctan\left(\frac{2}{362619}\right)+14324\arctan\left(\frac{1}{275807}\right)-7528\arctan\left(\frac{1}{619858}\right)-3104\arctan\left(\frac{1}{734557}\right)-39408\arctan\left(\frac{1}{6826318}\right)+24224\arctan\left(\frac{1}{7626068}\right)-21120\arctan\left(\frac{1}{21072618}\right)$$