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    (5X-1.8)*4=2.3
    x^2-8.5x+15.7=0
    sqrt((-2-t)^2+(-2*t-4)^2)
    5x-0.16x^2=26
    17/16x^2+x/3-5/9
    2x^2+2x+3=0
    5.546=((0.021*x^1.85+955.4)^0.5)*x^0.84
    1041=((0.021*x^1.85+955.4)^0.5)*x^0.84
    x+50+x=x+60
    -151.2+x*(1-0.8%)=50
    5x+10=8(x-3)-2
    x^2-6*x+9=(2*x-1)^2
    2*x^2-4*x-1=0
    X-X*0.2-6=21956.39
    X-X*0.2-5.8=6708.55
    X-X*0.2-5.4=6568.84
    X-X*0.2-8.7=13438.79
    X-X*0.2-9.9=14744.78
    X-X*0.2-9.9=7521.28
    X-X*0.2-13.5=15507.07

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