e^x=501
    e^x = 101
    e^x=100
    {10*【（1-x/544)-（-0.8）】/【1.54-（-0.8）】+90}*0.03-{【10*（0.22-0.01）/（x/1600-0.01）】+90}*0.07+4=0
    e^x=7000
    0.4*e^x+0.6-e^(0.9*x)=0
    7+{10*【（1-x/544)-（-0.8）】/【1.54-（-0.8）】+90}*0.03=3+{【10*（0.22-0.01）/（x/1600-0.01）】+90}*0.07
    4+{10*【（1-x/544)-（-0.8）】/【1.54-（-0.8）】+90}*0.03={【10*（0.22-0.01）/（x/1600-0.01）】+90}*0.07
    7+{10*【（1-x/544)-（-0.8）】/【1.54-（-0.8）】+90}*0.03=3+{【10*（0.22-0.01）/（x/1600-0.01）】+90}*0.07
    7+{10*【（1-x/544)-（-0.8）】/【1.54-（-0.8）】+90}*0.03=3+{【10*（0.22-0.01）/（x/1600-0.01）】+90}*0.07
    arctan(x)+arctan(0.2x)=90
    157838÷12000＝x÷125938
    (1-x)^0.5
    A=29498400+110160+10000000*0.005+20000000*0.002+(A-30000000)*0.0015+A*0.06+0.0072*A
    A=29498400+110160+A*0.0015+A*0.06+0.0072*A
    （5x+109）x=2500
    （7+5x）x=2500
    X+9.10*X^0.4=117.51
    x/e＾x=4/e＾4
    X+13.45X^0.4=157.47

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