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    x^2*x+x=240
    1100*sin(x)+905*cos(x)=1062
    1100*sin(x)+905*cos(x)=1062
    x^3-2x-x=0
    118116.8*((1+x)^4-1)/(x*(1+x)^4)=370000
    126*((1+x)^10-1)/(x*(1+x)^10)=600
    1392.6*((1+x)^4-1)/(x*(1+x)^4)=4414.3
    1392.6*((1+x)^4-1)/(x*(1+x)^4)=370000
    330000/(1+x)^4+230000/(1+x)^3+130000/(1+x)^2+30000/(1+x)=520000
    50000*((1+x)^4-1)/(x*(1+x)^4)=150000
    x^2+2x+3=0
    2x=lnx
    2x=lnx
    sinx=0.95x
    4x+3=5x-2
    (6-x)^2+3^2
    ln(2-5/x)=2-10/x
    0=0.6-0.2-[(1+X)/X]*0.05*(1-0.3)
    5/7x=2/3x+2
    1/5(x-9)=1/2x-9

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