Mathematics
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    x^8+2x^6+3x^4-4x^2+1=0
    2594.4=2.1795^2*4854*10^(30)/(9.7*10^15+7.35*x^2)^2-293*10^7/x
    2594.4=2.1795^2*4854*10^(30)/(9.7*10^15+7.35*x^2)^2-293*10^7/x
    cos(i)
    cos(i)
    155-x+1=x乘(1-5%)
    X/3*9-(5X-3X)=1
    -x+6=2/3x-8/3
    -x+6=-2/3x-8/3
    -x+6=-2/3x-3/8
    -x+6=-3/2x-3/8
    21+x=30+1/10x
    X/3*9-(5X-3X)=1
    m^2/1+m/1=7
    600x=400(30-x)
    x²+x-240=0
    x500+x600+x750=30
    600x=30-x
    1000x=30x
    (-2x+240)*(x-50)

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