M000000039

$$\pi=2148\arctan\left(\frac{2}{1511}\right)+1436\arctan\left(\frac{1}{4443}\right)-20\arctan\left(\frac{2}{86161}\right)-684\arctan\left(\frac{1}{58898}\right)-1368\arctan\left(\frac{1}{110443}\right)-176\arctan\left(\frac{1}{740943}\right)-352\arctan\left(\frac{1}{5926518}\right)$$