174.6×1.3+2×35×√1.3
    9×19.4
    148.03×0.877-2×12×√0.877
    126.45+16.6×1.3
    126.45×0.767-2×35×√0.767
    126.45×0.877-2×12×√0.877
    38.47+16.6×5.3
    11.62+17.9×1.5
    0.7×16.6
    √1.04×10^-4.19
    2.303*0.082*0.118/0.2
    sqrt((sqrt(13)-1)/2)
    [sqrt(13)-1]/2
    sqrt(9)
    arctan1
    arccos0.913590048
    arccos0.913590048
    sqrt(2+sqrt(3))+sqrt(2-sqrt(3))
    √8721
    arccos（-0.958）

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