M000000156

$$\pi=25486576\arctan\left(\frac{1}{18975991}\right)+20970444\arctan\left(\frac{1}{22709274}\right)+25914536\arctan\left(\frac{1}{24185182}\right)-2594848\arctan\left(\frac{1}{24208144}\right)+6295184\arctan\left(\frac{1}{54610269}\right)-2476996\arctan\left(\frac{1}{63199427}\right)-17844312\arctan\left(\frac{1}{100656977}\right)-5429620\arctan\left(\frac{1}{115453918}\right)+11605360\arctan\left(\frac{1}{201229582}\right)+10627176\arctan\left(\frac{1}{909140573}\right)+5350072\arctan\left(\frac{2}{4532659739}\right)-19569300\arctan\left(\frac{2}{4949475989}\right)-16215120\arctan\left(\frac{2}{6223926959}\right)+7059144\arctan\left(\frac{1}{18986886768}\right)$$