4x+0.01*4x=1352
    x+0.01x=1352
    lnx=0.358
    lnx=0.5
    85000000*(1+0.115)^12*0.115/((1+0.115)^12-1)=x
    85000000*(1+0.0115)^12*0.0115/((1+0.0115)^12-1)=x
    85000000*(1+0.0115)^12*0.0115/(1+0.0115)^12-1=x
    85000000*(1+0.0115)^12*0.0115=x*(1+0.0115)^12-x
    85000000*(1+0.0115)^12=(x*(1+0.0115)^12-x)/0.0115
    85000000*(1+0.0115)^60=(x*(1+0.0115)^60-x)/0.0115
    2/0.029516x=1
    π/(x*√(1-0.33*0.33))-0.1
     -x*π/(√(1-x*x))-ln1+ln3
     -x*π/√(1-x*x)-ln1-ln3
    x^4+19x^2+38x=381
     -x*π/√(1-x*x)-ln1+ln3
    x4+119x2+38x=381
    x4
    -x*π/(1-x*x)-ln1+ln3
    1.10866/π×√(1-x^2)=x

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