M000000294

$$\pi=53983304181\arctan\left(\frac{2}{115004793075}\right)+48918708859\arctan\left(\frac{1}{102428655030}\right)+72031284574\arctan\left(\frac{2}{235558026661}\right)+16798518318\arctan\left(\frac{1}{120563046313}\right)+46965635220\arctan\left(\frac{2}{247015013489}\right)+66012812646\arctan\left(\frac{1}{146235453343}\right)+23900482641\arctan\left(\frac{1}{195274351082}\right)-49888679562\arctan\left(\frac{1}{378137211957}\right)+32080765187\arctan\left(\frac{1}{521433511178}\right)+66458965048\arctan\left(\frac{1}{798587208809}\right)+35102656695\arctan\left(\frac{1}{1687111941338}\right)-67709342249\arctan\left(\frac{1}{2196973730667}\right)+25196745133\arctan\left(\frac{1}{2267426627682}\right)-7094223295\arctan\left(\frac{1}{3037967579288}\right)+53554525186\arctan\left(\frac{1}{3737240479718}\right)-53697905807\arctan\left(\frac{1}{14113057272907}\right)-28686370121\arctan\left(\frac{1}{15962244871097}\right)-7029717687\arctan\left(\frac{2}{53518224361625}\right)+3348776662\arctan\left(\frac{1}{42205358676970}\right)-16101356001\arctan\left(\frac{1}{69971515635443}\right)-439509324\arctan\left(\frac{1}{96648634011432}\right)+49435512864\arctan\left(\frac{1}{150361024828932}\right)+1856724795\arctan\left(\frac{2}{7783134400901473}\right)-18355233795\arctan\left(\frac{1}{74295753693510382}\right)$$