（43.4+0.06×2）×2+（32.7+0.06×2+19.2+0.06×2）×2
    （43.4+0.06×2）×2+（32.70.06×2+19.20.06×2）×2
    cos(0.364864)
    sin(0.364864)
    tan(0.364864)
    π/0.364864
    (4*tan(0.364864)+4)*(4+4/tan(0.364864))/2
    1.7×10×17.7
    26×106×10
    1.7×106×10
    （0.24+0.36+0.25）×2
    1500×12
    212.5*30.28-212.5*32
    5600*30.28-600*32-5000*30
    C(6,2)
    13.92+10.3
    24.88×1.15+2×10.5×√1.15
    140.12×1.15+2×10.5×√1.15
    62.38×1.15+2×10.5×√1.15
    62.38×1.17+2×9×√1.17

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