1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.925)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.9)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.875)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.85)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.825)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.8)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.775)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.75)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.725)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.7)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.675)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*4.65)
    （27/16）*t^2-18*t+16=0
    （27/16）*t^2-(45/2)*t+16=0
    2*（x/360*3.14*0.45*0.45）-0.45*0.45*sinx*cosx=0.2*3.14*0.45*0.45
    2*（x/360*0.2*3.14*0.45*0.45）-0.45*0.45*sinx*cosx=0.2*3.14*0.45*0.45
    5.13=[37.1598×1.0188（X+0.1)]÷[1+1.0188×（X+0.1)]×[(100-15.51%-2.93）÷100]×[1÷（1+0.31×2.93)]+[8.33%×(X+0.1)]÷[(1.32×0.101325)]
    log(x)=-7.1587
    10X²+X
    x*1.3=2.54

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