M000000155

$$\pi=1093868\arctan\left(\frac{2}{1230349}\right)+2225728\arctan\left(\frac{1}{2298668}\right)+907296\arctan\left(\frac{1}{5033696}\right)+1564896\arctan\left(\frac{1}{5835807}\right)-708832\arctan\left(\frac{1}{8519197}\right)+377908\arctan\left(\frac{2}{42557349}\right)+609268\arctan\left(\frac{1}{168623905}\right)+1398468\arctan\left(\frac{1}{225823278}\right)+511676\arctan\left(\frac{1}{227661182}\right)-517896\arctan\left(\frac{2}{1091236511}\right)+707972\arctan\left(\frac{1}{657922943}\right)-497352\arctan\left(\frac{1}{7804016832}\right)+895804\arctan\left(\frac{1}{8120692247}\right)$$