2x^3 + 5x^2 - 3x
    0.4396094*X=2512921.78
    32x^3-24x^2-24x+19=0
    10lgX=-9
    10lgX=3
    x^3-6x+2
    3x^2 * e^(2x)
    260+0.12X=0.98X
    2x + 3/(x+1)
    log(-1/3(x^3))
    x(70-2x+2)=650
    20000÷x=0.00545
    1÷x=2
    1×x=2
    x*x=4*x*x+10000+90000-1200x
    xcosx
    x*x=10000+90000+4*x*x-600x
    X^(2)/16+x-100=0
    x^(3)/6400+x^(2)*26/400+x = 100
    x^3/6400+x^2*26/400+x=100

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