arcsin(3230/2730)
    arcsin(2730/5900)
    arcsin(2730/5900)
    arcsin46.3
     arcsin46.3
    arcsin463
    arcsin463
    sin1.18
    1.18*sin50
    (28.61×10^3)/(300×300)
    28.61/0.36
    1.0×((0.3+0.2+0.16+3)×0.9×0.9+(24+1.5)×1.0×0.9×0.9)+1.0×((2.5+2.0)×0.9×0.9+1.35)
    (1.1×39.20×10^3)/(0.475×537.2)+(1.1×0.0675×10^6)/7293
    (1.1×36.17×10^3)/(0.475×537.2)
    1.3×((0.3+0.2+0.16+3)×0.9×0.9+(24+1.5)×1.0×0.9×0.9)+1.5×((2.5+2.0)×0.9×0.9+1.35)
    1.3×((0.3+0.2+0.16+3)×0.9×0.9+(24+1.5)×1.0×0.9×0.9)+1.5×((2.5+2.0)×0.9×0.9)
    (6×6)/((6+1)×(6+2))×11.96/5.7
    1/2×8.8×8.8×0.22+8.8×0.39
    =1/2×8.8×8.8×0.22+8.8×0.39
    (22.1×10^3×44.2×10^3)/(4880000×5)

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