x^6=10^6
    X+X*0.08=763.2
    X+X*0.08=0.2544
    25+x＝32.827+149.692-x
    25x×25x-11+50x=0
    250*sqrt(1+(0.33x)^2)*sqrt(1+(0.68x)^2)/(x*sqrt(1+(0.1x)^2)*sqrt(1+(0.01x)^2)*sqrt(1+(1.75x)^2)*sqrt(1+(0.17x)^2))=1
    -20lgx-10lg4 = 20lg(250/(30*sqrt10))
    -20lgx-20lg4=20lg(250/(30*sqrt10))
    250*sqrt(1+(0.33x)^2)*sqrt(1+(0.68x)^2)/(x*sqrt(1+(0.1x)^2)*sqrt(1+(0.01x)^2)*sqrt(1+(0.42x)^2)*sqrt(1+(0.17x)^2))=1
    250/(30*sqrt(1+(0.1*30)^2)*sqrt(1+(0.01*30)^2))=4/x
    250/(x*sqrt(1+(0.1+x)^2)*sqrt(1+(0.01x)^2))=1
    2 X + 7- X = 3
    (x-3)^2-9=0
    ((1.01^(x))/(0.99^(x)))=3
    n*(n-1)=72
    6（a-2）^2-12（a-2）=144
    6（a-2）^2-8（a-2）=144
    8（a-1）+4（a-2）-6（a-2）^2=144
    8（a-1）+4（a-2）-6（a-2）（a-2）=144
    30*sqrt(1+(4x)^2)/(x*sqrt(1+(41x)^2)*sqrt(1+(0.1x)^2)*sqrt(1+(0.2x)^2))=1

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