Mathematics
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    X-(X-51.75)=2.05
    30x+20(100-x)>=2580
    130x+100(100-x)<=11815
    0.440≤0.6667×sin(3.14×A)+A×(1-sin(6.28×A)÷6.28×A)×0.875+4
    a(a+4)<0
    391.3×10^6≤360×64000000×(0.78×400+350×sin0.785/0.785)
    0.428≤0.6667×sin(3.14×A)+A×(1-sin(6.28×A)÷6.28×A)×0.875+4
    391.3×10^6≤777.2×10^6×sin(0.72)×sin(0.72)×sin(0.72)+40127.4×A×(sin(0.72)+sin(2.481))
    391.3×10^6≤520×10^6×sin(0.72)×sin(0.72)×sin(0.72)+40127.4×A×(sin(0.72)+sin(2.481))
    391.3×10^6≤520.7×10^6×sin(0.72)×sin(0.72)×sin(0.72)+40127.4×A×(sin(0.72)+sin(2.481))
    391.3×10^6≤10.4×10^6×sin(0.72)×sin(0.72)×sin(0.72)+40127.4×A×(sin(0.72)+sin(2.481))
    391.3×10^6≤610×10^6×sin(0.72)×sin(0.72)×sin(0.72)+40127.4×A×(sin(0.72)+sin(2.481))
    2.28=3.036sin(3.14x)*sin(3.14x)*sin(3.14x)+14.3*x*[1-sin(6.28x)/(6.28x)]*{sin(3.14x)+sin[3.14*(1.25-2x)]}/[(1.25-3x)*3.14]
    3x2-12≤0
    X-2/3X=8
    x/2+(x+1)/3>0
    x*x+4x+5/2
    x/(4000+0.12x) = 2
    (2x+1)(3x+2)>12
    1-x>2x-5

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