Mathematics
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    1.5×2.1×0.5×30
    16.302+1.89+1.512=
    2.4×2.1×0.15×2
    1.5×2.1×0.15×4
    1.0×3.3×0.38×13
    3600/130.86
    111.89/ (95%*90%*1)
    3709.31/(39*0.85)
    1241.774+1610.763×5+235.638
    137800×1.71
    (15900-500)×2+(54000-500)×2=
    -1/2
    ((65000/3.3)*1.38)/(8*91.6%)
    asin((12.96-1)/(12.96+1))
    (1+sin(35))/(1-sin(35))
    90-arctan(6.32*0.5)
    90-atan(6.32*0.5)
    5*((16.67*1.36)^2+1)^(0.5)/((138.83*1.36)^2+1)^(0.5)/((1.36)^2+1)^(0.5)/((0.5*1.36)^2+1)^(0.5)/1.36
    20*lg(250/1250/1.39/1.39)
    0.417/3×(2×86.419+92.898)/(86.419+92.898)

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