M000000524

$$\pi=68\arctan\left(\frac{1}{3}\right)-68\arctan\left(\frac{1}{4}\right)-68\arctan\left(\frac{1}{30}\right)+32\arctan\left(\frac{1}{182}\right)+40\arctan\left(\frac{1}{5118}\right)+20\arctan\left(\frac{1}{6072}\right)$$