X*0.03=x-702.67
    sin(360x)=3.1415926x
    sin(360x)=x
    （20-2x）(10-2x)=128
    X*0.03=x-1252.67
    x+2x+x+9+x+9-25=173
    4800x+192000=16832x
    4800x+192000=17884x
    3600x+144000=12988x
    3600x+144000=12988x
    3600x+144000=12988x
    3600x+144000=12224x
    (x+2)/(x^2-2x)÷((8x)/(x-2)+x-2)
    (x+2)/(x^2-2x)÷((8x)/(x-2)+x-2)
    (x+2)/(x^2-2x)÷((8x)/(x-2)+x-2)
    3600x+144000=12224x
    3600x+144000=12224x
    3600x+144000=12224x
    3600x+144000=11460x
    3600x+144000=10696x

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