(x^2-4*x+3)*((x^5-9*x^4+28*x^3-35*x^2+15*x-1)*(x-1-2)-1*(x^4-7*x^3+15*x^2-10*x+1))+(6-2*x)*(x^5-9*x^4+28*x^3-35*x^2+15*x-1)=0
    (x^2-4*x+3)*((x^5-9*x^4+28*x^3-35*x^2+15*x-1)*(x-1-2)-1*(x^4-7*x^3+15*x^2-10*x+1))+(6-2*x)*(x^5-9*x^4+28*x^3-35*x^2+15*x-1)=0
    -57.3*0.8*x-arctanx=-180
    99.26=4*x+4*x^2+104*x^3
    (0.25-x)*(0.3-x)=0.625*(0.1+X)
    117342811.4-X-2991084.78-6616.34-11799138.74-5195181.88+1975943.54+51849.76+2274994.24-197318.28-5195181.88=37800559.73
    117342811.4-X-2991084.78-6616.34-11799138.74-5195181.88+1975943.54+51849.76+2274994.24-197318.28-5195181.88=13230834.93
    12-（-3）x{1/4+[-1/2]²}=
    X-X/(1+6%)*6.72%=305553.9
    （0.25-x）（0.3-x）=0.625（0.1+x）
    12x-24/8=x+3
    (12x-24)/8=x+3
    (12x-24)÷8=x+3
    x²+0.558x=0.558*0.0055
    x²+0.558x=0.558×0.0055
    32.31x^(1/3)=x-5.8
    41.84+（83.68-41.84）*5210000000*e^（-41.84/8.314*1000/t）-0.5*05*83.68*5210000000e^（-83.68/8.314*1000/t）*289000e^（-41.84/8.314*1000/t）=0
    100x^2+1.45x-0.01885=0
    100x^2+1.45x-0.01885
    (1-sin(x))/(1+sin(x))=1/3

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