96,94,98,84,102,143,167
    27,24,25,24
    27,24,25
    21,25,23
    3.4=((2×10×sin（x+20）×sin(x-20))÷(19×(1-cos(x-20)))
    67 78 112 6218
    67 78
    67 76 118 404 191 95 105 362 44122
    67
    2,4,5,2,3,5,4,3,2,9,3,8,9,6,5,4
    (9/625)^(1/2)
    0.64^2*0.15^2+0.36^2*0.04
    f
    1-0.5*x/26500-7590/x
    (18500*12.387+8.44*X)/(18500+X)=10
    2,4,6,7,8,9
    11239932
    1123993222441111
    98
    10

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