Mathematics
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    0.75x+2=0.25x+12
    2x+4(35-x)=94
    (x-0.04)/(0.06-0.04)=(1140-1155.79)/(1063.23-1155.79)
    x*x*x*x-2*x*x*x+x-1
    5x/(x+1200)=2.42
    x-0.8-0.2*sinx=0
    x-0.8-0.2*cosx=0
    x-0.2*cosx-0.8=0
    x-cosx=0
    x*x*x+3*x*x-1=0
    (1.2x+360)-x=600
    300000=5831*(1-(1+x)^-60)/x
    (420*x)*0.005
    110+(n-9)(n-10)=22(n-9)
    n^2-41n+398=0
    110+(n-9)*(n-10)=11(n-9)
    n^2-30n+299=0
    x²-16x-64=0
    x2-16x-64=0
    2x=4+4x

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