(sqrt(3*x^2+4)+sqrt(x^2+2))/sqrt(x^2+1)=sqrt(2)/2
    27x^3=64
    X^3-2.41×320.8834^2-（27.08-8.45×0.0001×320.8834^2）×X^2=0
     75=1 *1*e^(14.39155-2795.817/(x+230.002))+1.679*(1-1)*e^(16.59381-3644.297/(x+239.765))
     75=1.006*0.9*e^(14.39155-2795.817/(x+230.002))+1.679*(1-0.9)*e^(16.59381-3644.297/(x+239.765))
     75=1.026*0.8*e^(14.39155-2795.817/(x+230.002))+1.506*(1-0.8)*e^(16.59381-3644.297/(x+239.765))
    3*450x=5*300(21-x)
     75=1.059*0.7*e^(14.39155-2795.817/(x+230.002))+1.368*(1-0.7)*e^(16.59381-3644.297/(x+239.765))
     75=1.108*0.6*e^(14.39155-2795.817/(x+230.002))+1.259*(1-0.6)*e^(16.59381-3644.297/(x+239.765))
     75=1.174*0.5*e^(14.39155-2795.817/(x+230.002))+1.174*(1-0.5)*e^(16.59381-3644.297/(x+239.765))
     75=1.259*0.4*e^(14.39155-2795.817/(x+230.002))+1.108*(1-0.4)*e^(16.59381-3644.297/(x+239.765))
     75=1.368*0.3*e^(14.39155-2795.817/(x+230.002))+1.059*(1-0.3)*e^(16.59381-3644.297/(x+239.765))
     75=1.506*0.2*e^(14.39155-2795.817/(x+230.002))+1.026*(1-0.2)*e^(16.59381-3644.297/(x+239.765))
     75=1.679*0.1*e^(14.39155-2795.817/(x+230.002))+1.006*(1-0.1)*e^(16.59381-3644.297/(x+239.765))
     75= 1 *(1 )*e^(16.59381-3644.297/(x+239.765))
     75= 1.006*(1-0.1)*e^(16.59381-3644.297/(x+239.765))
     75=1.679*0.1*e^(14.39155-2795.817/(x+230.002))+1.006*(1-0.1)*e^(16.59381-3644.297/(x+239.765))
    arctanw+arctan0.1w=30
    arctanw+arctan0.1w=90
    arctanw+arctan0.2w=90

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