-1.71=-2*x*0.08-(4*(x-0.08)^2+2*x*0.08*0.08-2*0.08*0.08+1)^0.5
    x-(x/1.01*0.01)-{（x-(x/1.01*0.01)）*0.8-(x/1.01*0.01*0.07/2)}*0.2-(x/1.01*0.01*0.07/2)=8000
    (13*60+0)-x+9677/6+2(7*60+19-x)/3=(43.5*60)
    (12*60+23)-x+9677/6+2(7*60+20-x)/3=(43.5*60)
    (11*60+57)-x+9677/6+2(7*60+21-x)/3=(43.5*60)
    (15*60+18)-x+9677/6+2(7*60+22-x)/3=(43.5*60)
    588＝（8+2x）*（54—4x）
    y =-5×5+16×5-60
    y =-5×5+16×5-60
    y =-25+80-60
    250-x=10000/x
    2500-x=10000/x
    2500-x=x/10000
    x^3=0.5
    2*x^3=(1-x)^3
    1271.8x=0.9906-11.6422x^（2/3）
    x^3=(1-x)^3
    （0.2+x）×（400+x/5）=0.15
    1/x+1/(x+3)+1/(x^2+2x+2)=0
    2z^3+8z^2+13z+6=0

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