P/5*3=P
    P-P/5*3
    x+x*0.06=2500
    t^2-2t^1/2+3=0
    （1-x）^（1/x）
    x－36046.01／x／0.13=0.02
    xtanx=3
    xtanx=1
    4x+(42-x)3=154
    xtanx=6
    xtanx=12
    xtanx=6
    896+0.5x＝x
    xlnx
    1.1269πx-sin（2πx）-0.1586=0
    381758=90000×n^10+100000×n^9+100000×n^8
    （135567+x）/2*38.15*0.01=6832.62
    （135567+x）/2*38.15*0.01=6832.62
    ln(x/0.0544)/(x-0.0544) = 2.5
    2t^3=(4-t^2)^3-3(4-t^2)^2

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