Mathematics
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    x^4+4x^2+5=0
    6 x+3=7 x-4
    X-10/10-0.1=1.1x-12/12
    10000/x+10000/x^2=15000
    5000+5000/x-8000/x^2=0
    8000/x+7000/x^2=10000
    0.8x=x-80
    (4-t)^2+(28/3-4t/3-4)^2=(t-7)^2+(t-28/3+4t/3)^2
    2400/x=(2400/(x-20))-10
    2x=4
    50*sin(x)/sin(36)=20/sin(x+36)
    83.04+0.4x=160
    83.04+x=155
    (346/2.5)×0.6+0.4x=155
    1/(x+1.25)=2/x+1/(x+2.5)+1/(x+5)
    1/X+2X
    3x^3-4x^2-15x+13=0
    4.5/(1+x)-4.5/(1+x)^2-4.5/(1+x)^3=95
    4.5/(1+x)-4.5/(1+x)^2
    4.5/(1+x)-4.5/(1+x)2

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