700000≤1/0.85*((1/1.7)*(0.4*1.43*250*2300-0.1*1000000)+0.8*360*x*2300)
    7x<60+x<8x
    (x^2)/2>sqrt(2x^2+2)
    -x^2-3x-4>0
    -x2-3x-4>0
    (1.12x+(1-x))*1.17>1.185
    (1.15x+(1-x))*1.145>1.18
    X²-3x+5>0
    abs(2x+1)+abs(x-2)<8
    (2a+2)²-4a(a+2)>0
    abs(x-1)+abs(2x-4)>3-x
    abs(xx-3x)<4
    1
    (x+7)/(xx-2x+3)<1
    abs(x+2)+abs(x-1)<5
    √(〖(17188-20000×300t/20099.75)〗^2+〖(1751.796-3t-2000×300t/20099.75)〗^2 )≤10
    320k²-507k+324＞0
    (x-3)/2+2>=x 1-3(x-1)<8-x
    5x-2<3(x+1) (2x-2)/3>=x-1
    -3*x^2+5*x-4>0

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