-2/3x²+1/3x+4=0
    11169.15=（220*63-x）*0.95
    d∧3＋4×d∧2＋5×d＋3＝0
    200*0.0793+x*0.0293=（200+x）*0.033
    200*7.93%+x
    -1/9（x-6）²+4 = 1
    x+x*0.09=6413686.51
    m^3-18m-8=0
    1-In x
    x^2-2001*x+1000=0
    x+5x/10=6000
    X-X/1.03*0.05-X/1.03*0.03=58849.56
    X-X/1.03*0.05-X/1.03*0.03=58849.56
    X-X/1.03*0.05-X/1.03*0.03=58849.56
    1/x-sinx
    0.05x-sinx
    sinx+x^3+x
    1 + 0.015n = (1.02)^(n-5)
    30888 = 【（220+260）*81-x】*0.85+8*81
    30888=【（220+260）*63-x】*0.85+8*81

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