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    74×30= 68×50= 75×40=
    64×50= 74×30= 68×50= 75×40= 64×5= 74×3= 68×5= 75×4= 64×50=
    65×40= 76×2= 66×2= 68×2= 65×4= 76×20= 66×80= 86×20= 65×40=
    62×5= 62×2= 85×60= 67×20= 62×50= 72×20= 86×20= 66×20= 68×20=
    85×60= 67×20= 62×50= 72×20= 85×6= 67×2=
    68×2= 63×3= 75×30= 64×30= 68×20= 63×70=
    75×30= 64×30= 68×20= 63×30= 75×3= 64×3=
    64×2= 62×2= 65×20= 62×40= 64×20= 62×60=
    65×20= 62×40= 64×20= 62×20= 65×2= 62×4=
    1/2 (109.89806+147.412591)
    20.2×(25.34+8.65)×0.2147
    20.2×25.34×0.2147
    20.2×25.34×(1-25.34/11.1×0.2147×0.5203)
    445.7*(sin0.69+sin2.54)/3.14
    1906.67*(sin0.69)^3/3.14
    396.2*(sin0.69+sin2.54)/3.14
    396.2*(sin1.32+sin1.287)/3.14
    1906.67*(sin1.32)^3/3.14
    -22.547*14^3 + 345.94*14^2 + 934.59*14 + 2616.7
    0.9461*14^5 - 28.593*14^4 + 271.93*14^3 - 836.04*14^2 + 2432.7*14+ 2443.8

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