x*99.975%-119.708*100.025%=1/10
    x^-3
    30/x=36/1.8x+20/60
    87013.33x^9=136845
    87013.33x^9+87013.33x^8+87013.33x^7+87013.33x^6+87013.33x^5+87013.33x^4+87013.33x^3+87013.33x^2+87013.33x^1=136845
    2x-x=26+29
    2x-26=x+29
    2（x-13）=x+16+13
    -2*x^2-x+2=0
    -2x^2-x+2=0
    （60-x）*（120+10x）=1800
    6＝-1/k+（16+1/k）e-2k
    6＝-1/k+（1）
    (4798.352+75155.52+41842x+344.922x+373.6x+206.9496x)*0.7= 345741+2838712.5+4123.4x+298951.05+1067660.39
    x*99.975%-120.254*100.025%=0.5/10
    x*99.975%-120.254*100.025%=1/10
     i+8%/9%-8%=5-4.6610/5.6044-4.6610
    x*99.975%-120.341*100.025%=0.5/10
    x*99.975%-120.341*100.025%=1/10
    12.11c=（3.3+c）×7.97

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