lg（（0.369^2+0.359^2+0.348^2+0.354^2+0.350^2）/5）*-10
    lg（（0.852^2+0.873^2+0.837^2+0.873^2+0.865^2）/5）*-10
    lg（（0.603^2+0.616^2+0.599^2+0.635^2+0.622^2）/5）/-10
    csc2
    cos(1/2)
    sec2
    sec(1/2)
    sec1/2
    cos1/2
    sec2
    arccos(0.05/(2*0.6))
    0.337*sin38.91
    0.337*cos38.91
    arctan(1/1.238741)
    arctan(1/1.238741)
    (0.6*tan(75/2)+0.05/2)/0.5+1/tan75
    0.203*0.000002*732841*sin5
    (2*0.0003/8/3.14+(400+171)/6/8000)*0.0003/2
    (2*1.09*0.00001/8/3.14+(400+171)/6/8000)*1.09/2
    1/2*(3/4*0.0025*((1-0.33^2)/220000+(1-0.0077^2)/1052000)*0.203)^1/2

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