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    (r-65/3)^2+(156/3)^2=r^2
    12.08x^3+50.06x^2-148.38x-2359.66=0
    240q^(3)-1000000q-1200000=0
    x(1-x)=16/45
    x(1-x)=8/45
    x/20=(100*100/(100+100))
    100/15=(x*x/(x+100))
    5x^2+x-3/4=0
    2x^2-5x-2=0
    4q^(3)-2000q-2400=0
    (50-x/25)×(800+x)=42025
    (50-x/25)×(40000+x)=42025
    x/6=(100*100/(100+100))
    x^4-x^2-2*x-1=0
    4220.26*x^0.75=(13.38-x)/0.000488
    500/6=(x*x/(x+100))
    -3 + 2x^2 + 2x^3 = 0
    21√3+21
    (x-2.4)^2+17.28=(12-x)^2
    57.373067/√3

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