21.1*150x=360*157+150*0.167*0.0106*240000
    21.1*150x=360*157+150*0.167*0.0075*240000
    99-x÷2=4
    108+ x =0.618x(180+ x )
    150*21.1x*（1-0.002/3/0.0033）=360*157+200*157*0.0033（165/x-1）-200*157*0.0018+240000*（200/x-1）*0.0033*150*0.167
    x²-x+2=0
    X+（3700+X）*0.23=4094
    702*(1+x)^4=1271
    400/x=（400/0.8x)-2
    x^3-1=0
    x=99^33
    x=99^3
    x=99^2
    x=99^156
    x=3^15
    x=3^2
    8=3.5x+0.5x
    2*(0.24/2/0.0256-x)=(20*6.02*10^23/3.14/0.72*10^9)^0.5*(e^(x/2)-e^(-x/2))/2*1.6/10^19
    0.0256*2*(0.24/2/0.0256-x)=(20*6.02*10^23/3.14/0.72*10^9)^0.5*(e^(x/2)-e^(-x/2))/2*1.6/10^19
    0.0256*2*(0.24/0.0256-x)=(20/3.14/0.72*10^9)^0.5*6.02*10^23*(e^(x/2)-e^(-x/2))/2*1.6/10^19

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