M000000175

$$\pi=46329268\arctan\left(\frac{1}{27872057}\right)+18157246\arctan\left(\frac{1}{44203064}\right)+50179384\arctan\left(\frac{1}{144235918}\right)+20480112\arctan\left(\frac{2}{322564791}\right)+63818404\arctan\left(\frac{1}{201229582}\right)+59500208\arctan\left(\frac{1}{284862638}\right)+41116176\arctan\left(\frac{1}{778401733}\right)+3895290\arctan\left(\frac{1}{1514342682}\right)+15688916\arctan\left(\frac{2}{4204410541}\right)+1267878\arctan\left(\frac{1}{3866973557}\right)+16059344\arctan\left(\frac{1}{7427844818}\right)+10520998\arctan\left(\frac{1}{7959681215}\right)+42052804\arctan\left(\frac{2}{75525552427}\right)-6056702\arctan\left(\frac{1}{118034929852}\right)-8360772\arctan\left(\frac{2}{1087840667761}\right)-9024030\arctan\left(\frac{1}{169838669284032}\right)$$