（X-4）÷0.4-（X＋4）÷0.5=1
    b(1+25%)=20.5
    k-5.7=5.4
    49/4-a=7/5
    4*cos(x)=e^x
    80%m=9.2
    u+23.4=34.6
    100000*(x/(1.4128-x*0.0001))+500000*(x/(4.3250-x*0.0001))+200000*（x*10000/(14675.0000-x*10000))-34.19-76.25+63.75>=0
    f-41/4=28.35
    2（X-5）=X+5
    5s/6=8
    p(1+45%)=87
    q(1-4%)=2.4
    e-(5/12-3/8)=9/8
    2x+7+1=111
    2/5+g=9/10
    100000*(x/(1.4128-x*0.0001))+500000*(x/(4.3250-x*0.0001))+200000*（x*10000/(14675.0000-x*10000))-34.19-76.25>=0
    75%m=19.5
    x^5+x^4+1=0
    h-99.3=102.7

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