1.05^x
    216.8-433.6x+215.8x^2=0
    fw
    1.5×10^(8)＝x/(0.027-x)(0.035-x)
    X/(0.08-X)(3-2X)(3-2X)=0.0000117
    X/(0.08-X)(3-2X)(3-2X)=117
    arktan0.093
    （1+y)^60=120000*y*（1+y)^60+1
    2k∧3-3k∧2-8=0
    2k∧3-3k∧2+8=0
    2X-10/1=5/4-X
    4.315x＾2+4.315x-33.65=0
    0.04x＾2+0.355x-3.14=0
    4*d^3+15*d^2+16*d+6=0
    (x+0.13)xx4=0.0057
    (x+0.13)xx4=0.00057
    x^3-x^2+1=0
    x^3-x²+1=0
    -145.9x4-87.44x3-21.61x2+3.882x+0.008=0
    1.01+x/1.63+x=0.618

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