√x-1
    2x^2-1=-√3/x
    2x-1=-√3/x
    x＾8+x＾3=13
    x-13/x
    3/5t(4-9/5t)=4-4/5t(3-3/5t)
    1.5x-3x0.1=2.2
    1.1=1/X*ln（1-x）
    5x²+22x+10＝0
    （109681-2.5X）*12/23*0.9=23648+11X
    （109681-2.5X）*12/23*0.9=23648+10X
    500（1+m%）*1000（1+m/2%）=660000
    y
    -(5a-4)^2-3(5a-4)+4=-a
    -（5-x）²-3(5x-4)+4=-x
    800（x-2）+100=500x
    8x+(10-x)乘5=41
    8x十(10-x)X5=41
    1/xsin(1/x)
    1/xsin(1/x)

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