M000000081

$$\pi=3232\arctan\left(\frac{1}{1118}\right)+332\arctan\left(\frac{1}{2436}\right)+732\arctan\left(\frac{1}{5283}\right)-704\arctan\left(\frac{2}{47761}\right)+860\arctan\left(\frac{2}{313489}\right)-576\arctan\left(\frac{1}{2733307}\right)+1768\arctan\left(\frac{1}{23747457}\right)$$