11872/2.66=150*0.45*0.45*0.00001904*x/0.55/0.55/0.55/0.002/0.002+1.75*0.45*1.185*x*x/0.55/0.55/0.55/0.002
    14613/2.66=150*0.45*0.45/0.55/0.55/0.55*0.00001904*x/0.002/0.002+1.75*0.45/0.55/0.55/0.55*1.185*x*x/0.002
    14613/2.66=150*0.45*0.45/0.55/0.55/0.55*0.0001904*x/0.002/0.002+1.75*0.45/0.55/0.55/0.55*1.185*x*x/0.002
    x=400*(0.8*2^(1/2)*6^(1/2)/4-0.01*(1+0.959))*0.2*sin(-96)/(0.959*cos45)
    x/2+4/x=3
    sin x =0.959283
    arcsin0.959283=x
    sin x =0.959283
    0.8*2^(1/2)*6^(1/2)/4=0.256*x/((1-x*x)^(1/2)*0.996+0.087*x)+0.01*(1+x)
    log（x+1）
    1/x=2.035*lg(634817.83*x)-0.91
    4000*cos(x)+((750*4000*cos(x))/(153.86*206000*sin(x))) = 4000
    2*x=3*x-3－1
    0.256*x/((1-x^2)+0.087*x)+0.01*(1+x)=1
    4000*cos(x)+((75*4000*cos(x))/(153.86*206000*sin(x)))=4000
    1/x=2.035*lg(644684.44*x)-0.91
    （x-1）（x-3）（x-3）（x-3）（x-2）（x-2）
    56.5X-25.828X-860.924-(56.5X/1.13*0.13-25.82X/1.1*0.1)*0.1
    a＝arctana
    3600/x+10=3600/0.9x

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