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    arctan0.5
    26.23+0.13+0.66+1.42+1.64+3.64+0.6+0.13+0.77+0.13+0.77+0.66+2.7+1.25+3.22+2.2=
    26.23+0.13+0.66+1.42+1.64+3.64+0.6+0.13+0.77+0.13+0.77+0.66+2.7+1.25+3.22+2.2=
    2.6+2.35+2.97+1.84+3.5+1.82+0.15+3.05+2.7+2.47+1.47+1.31
    825.95×(tanarccos0.76-tanarccos0.92)
    971.7×(tanarccos0.78-tanarccos0.92)
    6.4*(tanarccos1-tanarccos0.9)
    80*(tanarccos0.64-tanarccos0.9)
    7*(tanarccos1-tanarccos0.9)
    90*(tanarccos0.6-tanarccos0.9)
    90*(tanarccos0.6-tanarccos0.9)
    9e-5
    9e-6
    96×(tan(arccos0.65)-tan(arccos0.9))
    (tan(arccos0.64)-tan(arccos0.9))
    tan(arccos0.63)
    1.25*7
    2*sin57.5052
    arctan1.57
    -2×(-1)

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