(140-120+10*3)/(120*3)*100％=
    1/2-5/2+1/4+2-3/4-2
    30000000×0.60×0.60/12/5.8*0.6*0.6
    2×30000000×0.3×0.6/12/3*0.6*0.6
    2×30000000×0.3×0.6/12/6*0.6*0.6
    30000000×0.60×0.60/12/3.5*0.6*0.6
    30000000×0.60×0.60/12/5.8*0.6*0.6
    1.5×30000000×0.3×0.6/12/3*0.6*0.6
    2×30000000×0.3×0.6/12/3*0.6*0.6
    2×30000000×0.3×0.6/12/3
    arctan0.70
    arctan0.70
    arctan1.43=
    1862784/0.75/14.3=
    3396880/0.75/14.3=
    1.6×14×15×6×1.05×1.1×0.8=
    1.6×14×30×6×1.05×1×0.8=
    sin90
    sin0
    sqrt2

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