ln（x+1）-2/x
    jhb
    （3－x∧2)∧1/2＋x
    2x+x-7
    152×(X+6)-840=X×160
    √3×x+x=21
    √3×x+x=21
    0.15+0.8*x/105.5005782+((x)/504.5253196)^2+（(0.8x）/36.88772363）^2=1
    0.2+0.8*x/105.5005782+((x)/504.5253196)^2+（(0.8x）/36.88772363）^2=1
    0.2+0.8*x/105.5005782+((x-0.14896585)/504.5253196)^2+（(0.8x-0.170246683）/36.88772363）^2=1
    0.2+0.8*x/113.4836601+((x-0.14896585)/370.0046787)^2+（(0.8x-0.170246683）/27.05241898）^2=1
    0.2+0.8*x/113.4836601+((x-0.14896585)-370.0046787)^2+（(0.8x-0.170246683）-27.05241898）^2=1
    (700-40000/x^2)/sqrt(28^2+(3417.6/x^2)^2)-2.325
    x²=4－x
    cos(x)=0.7758
    32.5/x=1.05
    32.5/x=1.05
    32.5/x=1.05
    32.5/x=1.05
    32.5/x=1.05

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