x+2.13=0.097*sqrt（0.184）/0.184
    x^0.2=5.71
    (9k-10k^2-54)^2-4(k^2+1)(25k^2-45k+539)=0
    6.18+11.68+34.39+156.23+((2*36.2+9.6*(x+1.8))*(x+1.8)/2)=(85.35*2+38.21x)*x/2
    6.18+11.68+34.39+156.23+((2*36.2+9.7*(x+1.8))*(x+1.8)/2)=(85.35*2+38.21x)*x/2
    0.0791666*x+7.98660*x4=156
    x=(（3.5-2*x）/1.5)^2
    sinx=x
    lnx=e+1-x
    X^1+X^2+X^3+X^4+X^5+X^6=3
    2x+9<3-x
    (2×259.75×10^3)/130000
    -arctan(-0.325/1.5)
    (176.72×10^3×75^3)/(3×206000×4908738.52)
    (3×259.75×10^3)/(4×7853.98)
    (19.48×10^6)/98174.77
    X^1 X^2 X^3 X^4 X^5 X^6=3
    2143.18-101.52x=(((x-4.4)^2)/3)*(((129655.2+17741.17x+567x^2)/(391.82+33.67x))-((20825.82+390.06x+25.6x^2)/(154.172+5.06x)))
    161*x^2+18x+81=0
    (1/x^2)-(e^x)-4=0

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