x*(x+1)=1.52*10^(-18)
    arctan(x)＋arctan(0.5x)=5π÷18
    (X+8/7)X2=14
    (X+7/8)X2=14
    (X+7/8)X2=14
    (X+7/8)X2=14
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos186.1521546458836300＝1.037541522095388cosx-1.7835512148744654cos（x-186.1521546458836300）-0.006650087877870
    cos171.6674372335291100＝1.037541522095388cosx-1.7835512148744654cos（x-171.6674372335291100）-0.006650087877870
    cos171.6674372335291100＝1.037541522095388cosx-1.7835512148744654cos（x-171.6674372335291100）-0.006650087877870
    cos98.8478453541163730＝1.037541522095388cosx-1.7835512148744654cos（x-98.8478453541163730）-0.006650087877870

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