M000000115

$$\pi=152\arctan\left(\frac{1}{47}\right)-28\arctan\left(\frac{1}{307}\right)-28\arctan\left(\frac{1}{35709}\right)+4\arctan\left(\frac{2}{296489}\right)+4\arctan\left(\frac{1}{18677233307}\right)+28\arctan\left(\frac{1}{58802248042}\right)+28\arctan\left(\frac{1}{440238222726499757318}\right)$$