92/100＝x－4/x
    (X^2)-(5X)+6=0
    x+8=27
    0.4939=x/(x+0.1)
    610/1235=x/(x+0.1)
    610/1235=x/(1+0.1)
    x^2x
    （100-x）（5x+3000）=32000
     { (5-4x) }^{ 0.5 } + { (2-2 { (1- { x }^{ 2 } ) }^{ 0.5 } ) }^{ 0.5 } = { (5) }^{ 0.5 }
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=85.649
    X-X*0.065-(X+134566)*0.0003=134566
    √（5+√（5+x））=x
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=55.2
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=47
    tanx-x
    10x-x*x =24
    x*x-x=45
    （0.1-x）÷x×(5.6+4x)^4 = 2.09×10^13
    （0.1-x）÷x×(5.6+4x)^4=2.09×10^13
    （0.1-x）÷x×(5.6+4x)=2.09×10^13

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