9^9/9
    （16.5x+x）X2=65
    ch^-1(sqrt((10^4-1)/(10^0.04-1)))/ch^-1(5/2)
    (x-1)^2+3(x-1)
    cos19.948444
    sin(x)=0.989858
    4.868*x+4.541*cos(x)+11.32=0
    sinnnnnnnn=5
    absU=-3
    absG=8
    UHI=7
    2T=5
    17.5*350
    27.5*350
    sqrt(3.141592653589793238462643383279502884196179)
    （ln2）^2
    arcsin2.45
     -3E+05ln(2295334)+1E+06
     -3E+05ln(x)+1E+06
    arccos0.921

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