x^5+2x=1016
    x^4+4=0
    x^4-4=0
    x^16=2
    x^1024=2
    x^1024=-1
    sin(1/sin(x))=0
    sin(1/x)=0
    e^x=1
    sinxcosx=0.5
    x=(x+1/x)/2
    124.1*1000/200/x+2*194.5*1000*1000/200/x/x+0.5*((2*124.1*1000/200/x+4*194.5*1000000/200/x/x)^2+4*124.1*124.1*1000000/200/200/x/x)^0.5=19.1
    2x÷2.2=4.5
    （X-1）/x＝0.692
    2x十0.5x＝
    X6-4=X8-18
    X6-4=X8-18
    X6-4=X18-8
    Xx6-4=Xx18-8
    0.8b+45+(600-b)=555

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