M000308

$$\pi=-1950085840\arctan\left(\frac{2}{112899039159}\right)-92839355812\arctan\left(\frac{1}{102428655030}\right)+41046928768\arctan\left(\frac{1}{120563046313}\right)-238093027136\arctan\left(\frac{1}{120997144843}\right)+179604812560\arctan\left(\frac{1}{121409547033}\right)+294050230940\arctan\left(\frac{1}{138873731225}\right)-30748792700\arctan\left(\frac{1}{202954204459}\right)+255203095592\arctan\left(\frac{1}{261002206018}\right)+85193553324\arctan\left(\frac{1}{269007136889}\right)+85503479620\arctan\left(\frac{1}{548275361132}\right)-238093027136\arctan\left(\frac{1}{585933594225}\right)+575958381576\arctan\left(\frac{1}{656902304557}\right)+174043627728\arctan\left(\frac{1}{1372432573478}\right)+365806342476\arctan\left(\frac{1}{1622274975907}\right)+20004336152\arctan\left(\frac{1}{2710120765097}\right)-110870286436\arctan\left(\frac{1}{3761284561432}\right)+112872688800\arctan\left(\frac{2}{13078246979509}\right)-90009521548\arctan\left(\frac{1}{10892900268195}\right)-155128582640\arctan\left(\frac{1}{17780261434697}\right)+311080381244\arctan\left(\frac{1}{38759264489343}\right)+275955328968\arctan\left(\frac{1}{69971515635443}\right)+293079968696\arctan\left(\frac{1}{169838669284032}\right)-268720171828\arctan\left(\frac{1}{772654028018543}\right)-172825310872\arctan\left(\frac{1}{1948025182233307}\right)$$