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    (K-12)K=-4
    (K一12)K=-4
     x^2+(2.4x)^2 = 26^2
    50*(0.5-a)=0.5*(80-400a)
    4.2844=((25.07*0.532(x+0.1))/(1+0.532(x+0.1))*((100-12.21-1.3)/100)*(1/(1+0.31*1.3)+((2.14(x+0.1))/(1.37*0.101325))
    4.2844=((25.07*0.532(x+0.1))/(1+0.532(x+0.1))*((100-12.21-1.3)/100)*(1/(1+0.31*1.3)+((2.14(x+0.1))/(1.37*0.101325))
    4.2844=((25.07*0.532(x+0.1))/(1+0.532(x+0.1))*((100-12.21-1.3)/100)*(1/(1+0.31*1.3)+((2.14(x+0.1))/(1.37*0.101325))
    4.2844=((25.07*0.532(x+0.1))/(1+0.532(x+0.1))*((100-12.21-1.3)/100)*(1/(1+0.31*1.3)+((2.14(x+0.1))/(1.37*0.101325))
    4.2844=((25.07*0.532(x+0.1))/(1+0.532(x+0.1))*((100-12.21-1.3)/100)*(1/(1+0.31*1.3)+((2.14(x+0.1))/(1.37*0.101325))
    4.2844=((25.07*0.532(x+0.1))/(1+0.532(x+0.1))*((100-12.21-1.3)/100)*(1/(1+0.31*1.3)+((2.14(x+0.1))/(1.37*0.101325))
    3t^2-20t+150=0
    60x--120x+480=200
    -120x+480-60x=200
    0.55*{(x-sin(2πx)/2π)+(3x-1.25)*0.15}=2/3*{(sin(πx))^3/π}+0.15*500/550*{sin(πx)+sin(1.25π-2πx)}/π
    0.37*{(x-sin(2πx)/2π)+(3x-1.25)*0.165}=2/3*{(sin(πx))^3/π}+0.165*520/600*{sin(πx)+sin(1.25π-2πx)}/π
    0.44*{(x-sin(2πx)/2π)+(3x-1.25)*0.15}=2/3*{(sin(πx))^3/π}+0.15*540/600*{sin(πx)+sin(1.25π-2πx)}/π
    7x^2+8x-8
    7x2+8x-8
    0.1-x/x-3x^2=2.14*10^18
    20000=(x-6)*1000-5000

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