M000000261

$$\pi=92950973316\arctan\left(\frac{1}{16077395443}\right)+35325159804\arctan\left(\frac{2}{86479075199}\right)-84694213424\arctan\left(\frac{1}{45913688182}\right)-42536322100\arctan\left(\frac{2}{112899039159}\right)-65949987004\arctan\left(\frac{1}{71617196968}\right)-14349727468\arctan\left(\frac{1}{78535779057}\right)-3001807084\arctan\left(\frac{1}{102428655030}\right)+14304072956\arctan\left(\frac{1}{197877956739}\right)-34924321236\arctan\left(\frac{1}{225891903693}\right)-3154478664\arctan\left(\frac{1}{283378114193}\right)-46617931520\arctan\left(\frac{1}{324363564309}\right)+52577475424\arctan\left(\frac{1}{469027618483}\right)+68406237696\arctan\left(\frac{1}{492806748932}\right)+97315992024\arctan\left(\frac{1}{751830514193}\right)+111863671544\arctan\left(\frac{1}{821345641657}\right)-10876170496\arctan\left(\frac{1}{3737240479718}\right)-16986797308\arctan\left(\frac{1}{22486542112682}\right)-19728361416\arctan\left(\frac{1}{28148191112477}\right)-9302439992\arctan\left(\frac{1}{55707370528529}\right)-23666738664\arctan\left(\frac{1}{69971515635443}\right)-29588615156\arctan\left(\frac{1}{109805699900318}\right)-93356370988\arctan\left(\frac{1}{7474541196075273}\right)$$