M000000055

$$\pi=117852\arctan\left(\frac{1}{31182}\right)+1592\arctan\left(\frac{2}{362619}\right)-104260\arctan\left(\frac{1}{188703}\right)-75328\arctan\left(\frac{2}{2885139}\right)-41936\arctan\left(\frac{1}{1610057}\right)-41204\arctan\left(\frac{1}{2086882}\right)+32816\arctan\left(\frac{1}{6826318}\right)-82408\arctan\left(\frac{1}{56451973}\right)+51104\arctan\left(\frac{1}{103224943}\right)-34408\arctan\left(\frac{1}{20318316993}\right)$$