x
    x=1477+x*0.0524
    （220*2*47-X）*0.9=16084
    （220*2*37-X）*0.9=16084.34
    （220*2*47-X）*0.9+8*47=16084.34
    200*X=50+(60+90)*X
    x*18=243+1458/x
    5.4×1.5x=0
    (x-1) * (e^x + 5) = 1
    (x-1) * (e^x + 0) = 1
    (x-1) * (e^x + 10) = 1
    （27.776+x）×2.95＝55.552+76.628-x
    （27.776+x）×2.75＝55.552+76.628-x
    （27.776+x）×2.55＝55.552+76.628-x
    （27.776+x）×2.35＝55.552+76.628-x
    （27.776+x）×2.15＝55.552+76.628-x
    （440*47-X）*0.9=16084.34
    x*1.05=55
    x^2+17.5x=50
    （（1+3x）^3）=（（2-x）^2）

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