Mathematics
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    1×0.8×1.39×0.4×2.8
    5×3.3×1.2×26+4×0.8×0.8×1.2×26
    1680×1.5
    arctan11
    arctan11
    arctan11
    √3+√1
    √1+√-1=
    (1320+729.58)/16.5+(244.46/13.75)
    1.2×(607.98)
    5×3.3×1.2×26+4×0.8×0.8×1.4×26
    (1320+617.76)/16.5+(244.46/13.75)
    5×3.3×1.2×26
    (1320/4+23.38)/0.64+(244.46/3.58)
    (1320/4+23.38)/0.445+(244.46/3.58)
    0.667×0.667×0.867×26+0.4×0.4×0.4×26
    (1320+566)/18.15+(244.46/16.64)
    (330+378.38)/4+(244.46/1.29)
    2×2×2.6×26+1.2×1.2×1.2×26
    1.1×0.8×1.28×0.35

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