M000000085

$$\pi=3232\arctan\left(\frac{1}{1118}\right)+3484\arctan\left(\frac{2}{47761}\right)+3124\arctan\left(\frac{1}{26307}\right)-1396\arctan\left(\frac{1}{78813}\right)+528\arctan\left(\frac{2}{313489}\right)+1152\arctan\left(\frac{1}{2733307}\right)-332\arctan\left(\frac{1}{15996882}\right)+372\arctan\left(\frac{1}{23747457}\right)$$