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    X+4/5+1/3=3/4
    100000000*x*(1+x)^20/((1+x)^20-1)=7040000
    175/16=15/4x
    10x=1+x
    19x-8=18
    16=16x^2+x^2
    (2407+x)/(14162+6x)=1/6
    7x*⅓=(4x-1)*⅙+1
    n^2+n=420
    n^2+n=1000
    4k+(k^2-2)*2+2k+4=0
    x^2-x-6=0
    3*(2x+1)-5*(x^2+x)=-1
    3*(2x-1)-5*x*(x+1)=-1
    x^2-10*x+21=0
    (2x-1)^2-4*(2x-1)+4
    4(x-3)^2=25(x-2)^2
    ㏒(x,x+1)
    9a^4-148a^3+724a^2-1760a+1600=0
    x^2-14.5x+45=0

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