82-7x-38.6
    cosx=69
    1157.63=1000×(1+r)^3
    10lgX=6
    (x-x/1.09*00.03)*0.02=3297270.83
    X*0.06+X=2000000
    X*0.6+X=2000000
    777.99*6%*(1-x)*2=70
    757.49x-770.49x^2=17.16
    （x-3.552）*400-0.1=1
    x-(X*0.11)=7283
    （x-4.847）*400-0.1=2
    sinx*e^(x^2)
    10lgX=-9
    10lgX=3
    x/14.38=0.014
    log(10,x)=-3.78
    log(10,x)=3.78
    x/7.7=0.023
    x/4.56=0.036

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