Mathematics
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    arccos((sin33sin23.5-sin5.28)÷cos33cos23.5)
    arccos((sin29.56sin23.5-sin5.28)÷cos29.56cos23.5)
    arccos((sin2956sin23.5-sin5.28)÷cos29.56cos23.5)
    arccos((sin29.55633sin23.5-sin5.28)÷cos29.55633cos23.5)
    arcsin(sin23.5sin5.28+cos23.5cos5.28cos60)
    arcsin(sin23.5sin5.28+cos23.5cos5.28cos60)
    arcsin(sin23.5sin5.28+cos23.5cos5.28cos60)
    23.5sin13
    arccos((sin33sin23.5-sin5.68)÷cos33cos23.5)
    2×99.73÷15
    arccos(-tan30tan16.32)
    arccos(-tan30tan16.32)
    arccos(-tan30tan-0.415997)
    arccos(-tan30tan16.32)
    arccos(-tan30tan(-0.415997))
    -tan30tan(-0.415997)
    23.5sin(-44)
    23.5sin-44
    -tan30tan16.32
    arccos(-tan30tan16.32)

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