M000000218

$$\pi=228560924\arctan\left(\frac{1}{168623905}\right)+599708304\arctan\left(\frac{1}{284862638}\right)+297454688\arctan\left(\frac{1}{325248932}\right)-494596888\arctan\left(\frac{1}{599832943}\right)-408524164\arctan\left(\frac{1}{1012047353}\right)-58377516\arctan\left(\frac{1}{1125440538}\right)-135715016\arctan\left(\frac{1}{1962455907}\right)+253034304\arctan\left(\frac{1}{2315430018}\right)+137352596\arctan\left(\frac{1}{6746573033}\right)-448946964\arctan\left(\frac{1}{41253530807}\right)+118697436\arctan\left(\frac{1}{54863117693}\right)-80313772\arctan\left(\frac{1}{57821838732}\right)-475823876\arctan\left(\frac{1}{65553787597}\right)+196034936\arctan\left(\frac{1}{66492889557}\right)+72368168\arctan\left(\frac{1}{186498738693}\right)-105470284\arctan\left(\frac{1}{13688849577057}\right)-333082708\arctan\left(\frac{1}{30038155625330}\right)-73969680\arctan\left(\frac{1}{169838669284032}\right)$$