Mathematics
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    39.48*s^4-1600*s^2+400=0
    √x-x^2
    5y^2-32y+48= 0
    3x+8(480÷6-x)=480
    0.3009=x^4-x^0.25
    1/3(8x-50)-10=1/5(10x+40)
    a^2+1=0
    a^2+1=0
    3.5*s^2-12*s-5.5=0
    2.8*(x+24)=3*(x-24)
    (lnx+1)x∧x=0
    3x十2(7一x)=19
    75*x+520x-2128=0
    23250-(2700x+7×600+3000)×1.07=0
    23250-(2700x+7×600)×1.07=0
    23250-(2700x+5×600)×1.07=0
    23250-2700x-5×600=0
    cosx=0.8974/0.9
    (x/0.9)^2+((1.2-x)/4)^2=1
    23250-2x=0

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