X-X*0.05=200000
    1-2cosx-1÷x
    1-2cosx-1╱x
    1-2cosx-x∧1
    0.3835055111007/(0.00699085498296259*x+1)*(0.00699085498296259*x+1)=0.08333
    sinx=0.938271604938271604
    sinx=0.617
    3/4x²-9/2x+23/4=2
    15x²-98x+115
    x+1=1
    x(x-1)=560
    x(4+x)=16
    16-x^2=（25/36）-（4-x）^2
    6.286=（0.285+0.005X）*X^1.5
    -47/119*14/3+14/3b+14/3＝0
    -47/119*14/3+14/3b+14/3＝0
    -47/119*14/3+14/3b+14/3＝0
    e^x －x=x －lnx
    -47/119*14/3+14/3b+14/3
    -47/119*14/3+14/3b+14/3

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