(5600-1800)*g-5000*(1+g)*8%*50%=0
    abs(x-1÷x)=1
    x*0.01-0.5*0.01*sin(x)*cos(x)=0.0114583
    （x-6000*0.06）*（1-0.25）/3600=（x-6000*0.06-2400*0.08）*（1-0.25）/3000
    24x—16.8/x=3
    6∧-X
    −ab(ab+1)÷(−0.5ab)
    −ab(ab+1)÷(−0.5ab)
    （3X+0.01)*(4X+0.01)*0.47=0.112
    9x减36等于6x
    sqrt(3t^2-9t+9)=t
    sqrt(3t^2-9t+9)=3-t
    9x减36等于6x
    49减5x等于 36加7x
    sqrt(3t^2-12t+12)=3-t
    5x²=81
    8（1000-X）+5X=6950
    8（1000-X）+5X=6950
    8（1000-X）+5X=6950
    8（1000-X）+5X=6950

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