0.141×x^0.46=16.397
    3x²+16x+5＝0
    3x²+4x+7＝0
    5x²-22x+11＝8
    9x²-8x-3＝0
    339x²-332x+195＝0
    9x²-10x+7＝0
    arctanx/x
    x^2-1/x^2-3x+2
    1+4.7%=(1+r)(1+2.2%)
    4.7%=(1+r)(1+2.2%)
    Y²－6＝2
    Y＾－6＝2
    ＾Y－6＝2
    ((1-p)^179)*p=1
    p*(1-p)^179=1
     PV=24.5*（1-1/（(1+4.5%/2)^30))/（4.5%/2）+1000*(1/(1+4.5%/2)^30)
    948=1000*Rc*（1-1/（(1+5.1%/1)^8))/（5.1%/1）+1000*(1/(1+5.1%/1)^8)
    948=1000*Rc*（1-1/（(1+5.1%/1)^8))/（5.1%/1）+100*(1/(1+5.1%/1)^8)
    105430=（1700*（1-1/（(1+R/2)^32)））/（R/2）+100000*(1/（(1+R/2)^32))

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