23/107+34/4567
    X-5/7=2/6
    5/7+2/6=
    5/6+2/7=
    216/7
    2x-(x+1)/2 = 2+(x+1)/2
    x(24-3x)=50
    4.32/43.2
    2/44
    1-x-2/2≥1/6x
    1/x=(1)/(4)+(1)/(6)
    (1)/(4)+(1)/(6)
    3/4
    x/x+2=9/10
    3/7+x=4
    x-2/7-3/7=1/3
    11/17-（7/27/1/3-16/19）
    （x-1）^2+(15/8x+1/4)^2 = 36
    20%
    2.2099/（5.9375-2.0807）+0.7304/(3.1042-2.0807)+0.4789/(1.2292-2.0807)+0.0029/(1-2.0807)=x+1

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