(82^2-4*128^2*(sin(3.1415/27.170500))^2)^(1/2)
    82^2-4*128^2*(sin(3.1415/27.170500))^2
    e^15.66
    -95.73+298176.17/8.314*(1/298-1/4000)
    e^(-95.73)
    =0.02199*101325^0.5
    0.0898*(0.0449)^0.5/0.8653
    0.36÷0.16
    4/11÷-1/6
    (1/8)^-(1/3)*1+8^0.25*4√2+(3√2*√3)^6
    -23.2/-50.2*0.01
    0.5*10^(7.84135-1750/366)
    20lg（2^0.5）
    20lg2^0.5
    3.736/0.632
    （√2+√3）*（3√2+2√3）
    140*0.85=
    （1/4）×1＾-3/4
    （1.025）^12
    （1.25）^12

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