7600/(x+101*0.12)+12700/x=150
    7600/(x+101*0.12)+15100/x=150
    3600/(x+101*0.12)+20000/x=150
    7600/(x+101*0.12)+17500/x=150
    （X*7685624.27+3720.52）*0.05=1830.85
    （X*7685624.27+3720.52)*0.05=36617
    x^6-21x^2=20
    sin(π－x)
    （40.221+x）×0.85＝40.221+67.242-x
    （40.221+x）×0.85＝40.221+68.242-x
    （40.221+x）×0.85＝40.221+69.242-x
    （40.221+x）×0.85＝40.221+70.242-x
    （40.221+x）×0.85＝40.221+71.242-x
    （40.221+x）×0.85＝40.221+72.242-x
    8:5➕X =10．2
    17500/（x+12.12）+7500/x＝150
    17500/（x+12.12）+10000/x＝150
    （40/x+8.5）/（50/x+6.8）=0.507/0.493
    a=arccos(a)
    a=arccos（a）+sin(a)

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