√2x²-30x/7=180/7
    0.001x^2+0.001x+0.032=10
    x^4+8*x^3+4*x^2-1=0
    2*x^3+9/4*x^2+7/16*x-3/64=0
    0.0009x=1
    1.0009^x=2
    x^0.9=2
    x^0.0009=2
    x^0.09=1.1
    x^0.01=1.1
    x^0.08=2
    x^0.06=2
    x^0.01=2
    x^0.09=2
    x^0=1
    x^0
    4（x+2）=3/2x+23
    6x+32=11x-8
    0=4xx-3x+4
    （1+6%）*（1+5%）=（1+x）²

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