M000000012

$$\pi=732\arctan\left(\frac{1}{239}\right)+128\arctan\left(\frac{1}{1023}\right)-272\arctan\left(\frac{1}{5832}\right)+48\arctan\left(\frac{2}{226043}\right)-400\arctan\left(\frac{1}{6826318}\right)+48\arctan\left(\frac{1}{109027476193}\right)-48\arctan\left(\frac{2}{3375905320682366575989}\right)$$