(x^3)4√14+25(x^2)-7=0
    ln(t)-0.45 t^2 +0.8(t^2+2t)^(-0.2)=0
    4√14(x^3)+25x^2-7=0
    (1.79*10＾-5)*(x+1.79*10-5)/(0.1-1.79*10＾-5)=0
    13x-8=3+2(4x+7)
    x^2=0.0000179（0.2-x）
    ln(2+x/2-x)
    arctan(1/3*cotπ)-arctan(1/3*cot0)
    4q∧4+q∧2-3q+1=0
    cos4x+5cos2x-6cosx+6=0
    20x-(15x+80)=0
    0.0092174253+170.61834*x+1206.0703*x^1.5-4614.6537*x^2.5+6556.842*x^3=0.3595
    a^2-8a-16=0
    2/【1+（2x+1）^2】^3/2
    2－(2x－4)÷3=－(x－7)÷6
    x^4-10*x^3+1=0
    x√8－x²
    1.589*e−0.5r+1.589*e−r+1.589*e-1.5r+1.589*e−2r+101.589*e−2.5r=101.617
    1.589×e−0.5×r+1.589×e−1×r+1.589×e-1.5×r+1.589×e−2×r+101.589×e−2.5×r=101.617
    5(x*x)=0

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