0.049*sin(x)/cos(x-5)+0.01*(1+sin(x)) =1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x))=1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x))=1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x))=0.05
    1/x-1/x^3
    ((0.049*sin(x))/cos(x-5))+0.01*(1+sin(x)) =1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x)) =1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x)) =1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x))=1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x)) =1
    0.049*sin(x)/cos(x-5)+0.01*(1+sin(x)) = 0.05
    0.049*sin(x)/cos(x-5)+0.6*(1+sin(x))=0.05
    0.049*sin(x)/cos(x-5)+0.6*(1+sin(x))=0.05
    x^2+200*x+20000=48400
    36/x十20x一20x=55
    e^x+e^（-x）
    （3400*9000+5000*x）/（9000+x）=4000
    （3400*9000+4500*x）/（9000+x）=4000
    0.0000176＝（x*x）/（0.1-x）
    10000/(125.64+x)+7800/(185.64+x)+10000/（185.64+x）=150

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