a-sin(a)*cos(a)=0.066725
    x2-7x+11.29=0
    x/(1-x)^2=(0.99-x)*10^4
    a-sin(a)*cos(a)=0.0628
    x/(1-x)^2=(0.99-x)*10^-4
    a^4-2*a^3+26*a^2-2*a+1=0
    a-sin(a)*cos(a)=0.07065
    289.665X-13424.3648+（247.84X^2-892.49X+446.9)/(X+0.5)=0
    (3/(1+9*(x^2)))^2+(4-9*x/(1+9*(x^2)))^2-(16/5)^2
    a-sin(a)*cos(a)=0.074575
    a^3-7*a^2+16*a-12=0
    （x^(2)-4x+1）÷x>0
    （x^(2)-4x+1）>0
    （x^(2)-4x+1）÷x
    x^2+x+1=0
    x=1.9×0.723×138.22/200000×(1.9×65+0.08×40/0.0251)
    x=1.1-0.65×2.01/(0.0251×138.22)
    ((3-12*x)^2+(4-9*x)^2)/(1+9*x^2)^2-(16/5)^2
    x=(882.44×10^6)/(0.87×730×10052.8)
    b^(2)-6b+ 8=0

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