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    26.5*(67x/33)+27x=48527.3565
    -(s+1)(s+2)(s+3)/(2s+8)=0
    -(s+1)(s+2)(s+3)/(2s+8)=0
    207.2615/(1+x/12*7)+647/(1+x/12*13)+0.4635/(1+x/12*24)=796.925
    (x-119.713)*10-1-1=3
    (x-119.713)*10-1-1=1
    12*(740+144*sqrt(13))/(308+8*sart(13))
    tan(a)=0.666666
    (x-107.331)*10-1-1=3
    (x-107.331)*10-1-1=1
    (x-123.425)*10-1-1=1.5
    (x-123.325)*10-1-1=1
    4x^2-10x+9=0
    sqrt(2)x-2=2x^2
    x^2+x-1=0
    x
    (1-0.36)x=1.6
    x-0.36x=16
    (1-x)(4-x)(9-x)+32(x+5)=0
    7+2x-2=15+x

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