M000320

$$\pi=645457936156\arctan\left(\frac{1}{1259851011582}\right)+1208311485536\arctan\left(\frac{1}{1686145264193}\right)+1888889935624\arctan\left(\frac{1}{2267426627682}\right)-520426090140\arctan\left(\frac{1}{2401808546428}\right)-2057528623548\arctan\left(\frac{2}{5345202735279}\right)+473603512404\arctan\left(\frac{1}{3621667588383}\right)+3053824469092\arctan\left(\frac{1}{5142102426318}\right)+851014145320\arctan\left(\frac{1}{5602034310634}\right)+3412910967232\arctan\left(\frac{1}{5688475754312}\right)-1280607987240\arctan\left(\frac{1}{6202471697443}\right)+1455130571096\arctan\left(\frac{1}{7580898173568}\right)+2454994156856\arctan\left(\frac{1}{12575227775843}\right)+3640245302280\arctan\left(\frac{1}{15962244871097}\right)-130895344992\arctan\left(\frac{1}{18104444568932}\right)+3055287369544\arctan\left(\frac{1}{18203022356332}\right)+243452127448\arctan\left(\frac{1}{23064526452057}\right)+868098279824\arctan\left(\frac{2}{74963671338441}\right)-1079962437020\arctan\left(\frac{1}{38057255532937}\right)+2218716384444\arctan\left(\frac{1}{69971515635443}\right)-487814943912\arctan\left(\frac{1}{79507238248932}\right)-3536774401796\arctan\left(\frac{1}{180481359172943}\right)+2096559196448\arctan\left(\frac{1}{240926005152903}\right)-478445592540\arctan\left(\frac{1}{389928169608307}\right)+2305173274644\arctan\left(\frac{1}{2549868113472987}\right)+1537979444484\arctan\left(\frac{1}{4439568777547493}\right)+1590737354424\arctan\left(\frac{1}{8489727499760268}\right)+39144638660\arctan\left(\frac{1}{74295753693510382}\right)$$