M000000007

$$\pi=332\arctan\left(\frac{1}{107}\right)+68\arctan\left(\frac{1}{1741}\right)-20\arctan\left(\frac{2}{226043}\right)-68\arctan\left(\frac{2}{75422509}\right)-20\arctan\left(\frac{1}{109027476193}\right)+68\arctan\left(\frac{1}{30705803243198}\right)-68\arctan\left(\frac{1}{193281764136998932}\right)+20\arctan\left(\frac{2}{3375905320682366575989}\right)$$