Mathematics
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    (2.74-1)/(1+0.751)
    (142.82×5.26+73.3×13.11)/359.45
    6-(1-6)
    4-(2-1)
    sin45 sin60
    sin45 sin60
    sin30
    √4/7
    √28-√4/7
    1.2×82.68
    (2502.01×8.79)/(9.85×0.08+98.20×0.72+60.88×1.89+224.85×9.30)
    (2502.01×8.79)/(484.1×6.573)
    (2502.01×8.79)/(9.85×0.08+98.20×0.72+60.88×1.89+224.85×9.30)
    (2502.01×8.79)/(9.85×0.08+98.2×0.72+60.88×1.89+224.85×9.30)
    142.82×1.894+2×73.7×√1.894
    19.3×7.4
    (359.45)×0.528-2×73.7×√0.528
    !(-2.6)
    !(-2)
    175.13+19.3×9.55

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