1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*2.00958016352592)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*1.90872144518848)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*1.74900012426728)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*1.04580333370724)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*0.731200563254618)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*0.557961526360925)
    16t^2+3600=36（t-10）^2
    x^2-14x+48=0
    x（x-1）=240
    (x-114513)^((x-114513)/1805297)=x-114513
    22.16/Z=21.6/3-Z
    8000/(x+12.12)+10000/x+5500/x=150
    x/5+x/3+x=1
    x/30+x/8+x=1
    -22.34/（1+X/12*2）+16/（1+X/12*4）=-69.33
    69.33-22.34/(1+X/12*2)+16/(1+X/12*4)=0
    x+x*0.7+x*0.1=4.67
    1+2x=3+2x
    y＝arcsiny
    -10lg（1-x）=11

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