32+0.6*17*5
    1+x=5.6
    X-X/1.09*0.09-X/1.09*0.09*0.07-X/1.09*0.09*0.03-X/1.09*0.09*0.02=6283249.28
    X-X/109%*9%-X/109%*9%*7%-X/109%*9%*3%-X/109%*9%*2%=6283249.28
    x+1/x＝－1，x^2019+1/x^2019
    (x+1)-6(x+1)-4=0
    0.85*45X+0.15*15X=18500*0.53
    0.85*45X+0.15*20X=18500*0.53
    0.85*45X+0.15*20X=14000*0.53
    (45678 + 84567 + 78456 + 67845 + 56784)÷6
    (62345 + 23456 + 34562 + 45623 + 56234)÷5
    12960-4.4x=1.3034x
    （12960-4.4x）除以34.3x=0.038
    （12960-4.4x）除以34.3x乘以100%=3.8%
    (x+1)^3-6(x+1)-4=0
    x^3-6x-4=0
    (4410000+480^2)/（2*480）
    (4410000+480^2)/2*480
    （2+x）/2=5
    （x-2019)(x-2020) = 2021*2022

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