sin36.869898*cos36.869898
    sin36.869898
    sin36.869898*cos36.869898
    cos36.869898
    sin36.869898
    arcsin(3/5)
    arcsin3/5
    arcsin0.5
    sin30
    sin30
    (67.35×4.59+24×12.04)/219.04
    (84.83×4.59+24×12.04)/256.24
    (95.94×15.55+13.1×26.8)/274.72
    √3*380*120*0.85
    !(5)
    (197.37×2.87+336.96×1.05)/(31.68×3.08+169.99×1.09)
    67.35×1.8+2×24×√1.8
    23.88×1.8+2×24×√1.8
    23.88×1.723+2×49.1×√1.723
    23.88+18.9×2.3

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