log(2)10
    (82^2-4*128.6718576257230^2*(sin(3.1415926536/14.625714))^2)^(1/2)
     (82^2-4*128.6718576257230^2*(sin(3.1415926536/25.405464))^2)^(1/2)
    (82^2-4*128^2*(sin(3.1415926536/25.405464))^2)^(1/2)
    cos(35-26)-tan(41.3)/1.2*sin(35-26)
    tan15*sin20
    cos25
    100+580cos35tan10
    580*sin35
    (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

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