M000000064

$$\pi=62324\arctan\left(\frac{2}{47239}\right)+48000\arctan\left(\frac{1}{96348}\right)+2324\arctan\left(\frac{2}{362619}\right)-14196\arctan\left(\frac{1}{734557}\right)+18620\arctan\left(\frac{1}{4433307}\right)+1064\arctan\left(\frac{1}{6826318}\right)+50372\arctan\left(\frac{1}{7626068}\right)+732\arctan\left(\frac{1}{26157373}\right)+26880\arctan\left(\frac{1}{106909557}\right)-8260\arctan\left(\frac{2}{15516975989}\right)$$