M000000234

$$\pi=244\arctan\left(\frac{1}{72}\right)-340\arctan\left(\frac{1}{1483}\right)-116\arctan\left(\frac{1}{8307}\right)-28\arctan\left(\frac{1}{9932}\right)+116\arctan\left(\frac{1}{27493}\right)-156\arctan\left(\frac{1}{29718}\right)$$