M000000101

$$\pi=76648\arctan\left(\frac{1}{40515}\right)+48000\arctan\left(\frac{1}{51412}\right)+36000\arctan\left(\frac{1}{219602}\right)+45628\arctan\left(\frac{1}{734557}\right)+105852\arctan\left(\frac{1}{1039784}\right)-25084\arctan\left(\frac{1}{6826318}\right)-11952\arctan\left(\frac{1}{7626068}\right)-63056\arctan\left(\frac{1}{9639557}\right)+732\arctan\left(\frac{1}{21072618}\right)+33676\arctan\left(\frac{1}{2539791558}\right)$$