x*0.9*1.5=2.83
    xlnx=34.3
    x^4-2x^3+5x^2-4x=4
    xlnx=49.8
    x^4-2x^3-5x^2-4x=4
    x^4-2x^3-5x^2+4x=4
    x^4-2x^3-5x^2+4x=4
    x-x*0.06=987
    1/sqrt(0.00021)=7/sqrt(x)
    1/sqrt0.00021=7/sqrtx
    1/(0.00021)^0.5=7/(x^0.5)
    1/(0.00021)^0.5=7/x^0.5
    7x-5=9
    √4x－x＾2
     x²-2024x+2023 = 0
     x²-2024x+2023 = 0
    （√98-√97）÷x
    45.40023894862605*X+44.86260454002389*X=10000
    16.5×a×0.5=5.5
    1.5x－x＝10

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