12.333乘以3
    5/3*(-1/3)-5/3
    (e^(14.09*0.09)-e^(-14.09*0.09))/((e^(14.09*0.09)+e^(-14.09*0.09))/2)
    28*0.076*-510/14.09
    ((e^(-14.09*0.045)+e^(14.09*0.045))/2)/((e^(-0.09*14.09)+e^(0.09*14.09))/2)
    (e^(-14.09*0.045)+e^(14.09*0.045))/2
    sqrt(-ln(138.99/1120)(740^2))
    (28*0.076/(55*1.95*10^(-4)))^0.5
    21+12.2*16.15
    19.1/15.4
    15.4*19.1
    (90.98-87.1)/(91.4-87.1)
    12.554-0.646
    (52.254-52.06)/(52.41-52.06)
    24.905-1.203
    (17.243+18.091)/2
    (35.72-35.718)/(36.121-35.718)
    (35.72-35.118)/(36.121-35.718)
    (11.56-11.471)/(11.59-11.471)
    （2.02÷1.3*48-55）÷（2.02÷1.3-1）

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