x+2=ln3
    156428.8402/355=150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-arctan(1/x)*3.1415926*(x^2+1)/360)*95*95/(355*(x+(x^2+1)^0.5)^2)
    156428.8402/355=150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-arctan(1/x)*3.14159265*(x^2+1)/360)*95*95/(355*(x+(x^2+1)^0.5)^2)
    42x²-2x+4=0
    5.5h-21sqrth-126.5
    x^2+2x=1
    x+1=0
    0.9458*（x+1.392）（x-0.558）（x^2-3.718x+2.718）=0
    0.9458*（x+1.392）（x-0.558）（x^2-3.718x+2.718）=0
    x^4-4x^2+7x-6=0
    1000/x+100x
    (x-0.8)(x^2+0.8x-0.32)=0
    x²-（4+4√3）x+16√3=0
    x^3-3x^2-12x+10=0
    sinx/sin(2/3π-x)=3/2
    x=ln4x
    x=ln4x
     ｛4.25（1+x）^11-4.25+95.75x｝÷x÷｛(1+x)^11｝ = 123.73
     ｛4.25（1+x）^10-4.25+100x｝÷x÷｛(1+x)^10｝ = 123.73
     ｛4.25（1+x）^10-4.25+100x｝÷x÷｛(1+x)^10｝ = 123.73

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