560x+3600=18230
    560x+2700=18230
    560x+1800=18230
    560x+900=18230
    1-200/a≤√(√2/2-1)
    -(1-x)*(1-x)*lnX=3
    [(3220+X)0.1+3220]0.06+3220=3735.2
    y-y^2=1
    5(x^1/2)x(2-5x)=6*3^1/2
    x^3+x^2+2x+3=0
    x＾3+2x-3=0
    19.32-0.006x-x=322
    220X+（130*0.7-X）*150+65*65+65*0.25*75=22696
    220X+（130*0.7-X）*150+65*87*0.25+87*0.25*75=22696
    s^2+0.6s+10=0
    3－4x÷6
    240-4x=40+(28/3)x
    3/6-4x≤2x－2x/3+1
    24-4x=40+9x
    180=30+6y

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