x*(0.0016x*x+1)^0.5=100
    45-26.5+9
    90-arctan2
    x^3-7x^2+16x-12=0
    370.7x^2+26.17x-1=0
    2x+3x=3x+1
    x^3-7x^2-16x-12=0
    3/4absx-1/3<2
    x-1641.58=0.0456x
    3x+3=6
    x-1624=0.05x
    （2absx-1）÷3+1>4
    3x+1=0
    0.4ln(350^(2)/x^(2)）+x^(2)/105500-0.62【ln（x^(2)/350^(2)）+（875^(2)-x^(2)）/875^(2)】=1.12
    3+2absx>5
    1-1/3absx<0
    x/1+√（2600000000/x）=570450
    x^2+0.0706x-0.0027=0
    2+1/3absx<5
    2 * x - 1 / 3 ≤3 * x + 2 / 4 - 1

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