cos171.6674372335291100＝1.037541522095388cosx-1.7835512148744654cos（x-171.6674372335291100）-0.006650087877870
    cos98.8478453541163730＝1.037541522095388cosx-1.7835512148744654cos（x-98.8478453541163730）-0.006650087877870
    cos91.0087727788304190＝1.037541522095388cosx-1.7835512148744654cos（x-91.0087727788304190）-0.006650087877870
    cos91.0087727788304190＝1.037541522095388cosx-1.7835512148744654cos（x-91.0087727788304190）-0.006650087877870
    cos91.008＝1.0375cosx-1.7836cos（x-91.008）-0.00665101
    56143-3000=X+0.0687X+（56143-X）*0.0687
    1.0375cosx-1.7836cos（x-91008）＝-0.01094191134
    m²＋5m＋5＝0
    15x^2-21x+8=0
    y*5%+y=11000
    y*5%+y=400
    y*5%+y=1000
    x/330*29=17
    0.001057069833404=1/x^2-1/(x+1)^2
    SQRT（5）
    X+X*0.03=209228
    sinx*cos23=sin(x+45)*cos22
    sinx=1
    S+S*0.035=23690
    1/（x－1）+1/（x－2）

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