M000067

$$\pi=43832\arctan\left(\frac{1}{39307}\right)+74020\arctan\left(\frac{1}{44179}\right)+48000\arctan\left(\frac{1}{167318}\right)+6796\arctan\left(\frac{1}{333367}\right)+1592\arctan\left(\frac{1}{390112}\right)-5476\arctan\left(\frac{2}{2885139}\right)+28648\arctan\left(\frac{2}{3142271}\right)+40472\arctan\left(\frac{1}{1610057}\right)+9900\arctan\left(\frac{1}{103224943}\right)$$