59+x=97
    3^0.5sin2x+2sinx+4*3^0.5sinx
    e^（-3.1415*（x/（1-x^2）））=0.05
    e^（-3.1415*（x/（1-x^2）））=0.163
    arctan(0.2x)+arctan(x)=45
    x^2+16x-225=0
    x4-x
    m^3+5m^2+m+3=0
    m3+5m2+m+3=0
    arctan(x)=45
    arctan(x)=1
    arctan(x)=1
    arctan(0.2x)-arctan(x)-arctan(0.01x)=-90
    3x²+13x+2=0
    [x+（9-x)]²=45
     x×x-2x-5=0
    X^4+X^5+X^6=3.38759
    n×n+(n+2)=274
    x (51-2x)=210
    A+1.02A/0.03*0.3336 =30

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