2x^3-6x^2-3x+8
    4x^3+6x^2-1
    X*25%-X=45
    60x×6=48x×7
    5×（x+23)+4x=1023
    e^x=-x
    0.3×3x+0.5x+0.6×（100-4x）=45
    16x^5-8x^3+x-4=0
    40%x/x-0.5=60%
    40%x/x-0.5=60%
    40%x/x-0.5=60%
    40%x/x-0.5=60%
    x-1/x
    125+X*25%=80+X
    a^2+(14-a)^2=100
    4＝596500x
    40000000000000000000＝5965000000000000000000000x
    2500x^2+2500x+500＝3140
    2500x^2+2500x+500
    x+2.4x=5.1

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