x乘x-5x+1=0
    8C2
    1.12x=358240.76
    x^(5-x)=1
    （77059-2.5X）*10.8/21.8*0.9=18356+9X
    13x^2-36x-124=0
    (X-6)/2022+(X-5)/2023+(X-4)/2024=3
    30=（x+1)*11-x*10
    5x+2x^2=0.75
    2xxx-3xx+1=0
    4y-3(2y+1)=1-7(3/14-9)
    2/1x-2=4+3/1x
    0.8x=0.7x-1
    x*e^x=5*e^x-5
    e^x=2
    x^4+x^3=24
    5*x=1
    x*e^x=5*x-5
    36.4(5+x)=210+33.6
    30x+40(50-x)=1650

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