tanx-x＝0.0143
    tanx-x＝0.0143
    ln x - x +1
    (x^2-1)/(2*x)=2*((7-x^2)/(2*(12-2*x^2)^0.5))^0.5-1
    3(x^3)－2(x^2)－75x+25=0
    4/7x+（x-5）12/23=x
    x^2-62x+36=0
    0=7╱64（x－4）∧2＋4
    -2／3x^2＋5x-6＝0
    -2/3x^2＋5x-6＝0
    3x^2-4x-4＝0
    x^8=4^x
    tanx-x=0.0241512
    5758*0.0283（40-x）^0.75=40.46*0.884（x-40）*0.3157
    12-16m+15m=72
    1-4/3m+5/4m=6
     2607*0.0283（40-x）^0.75 = 40.64*0.844（x-40）*0.3157
    sinx=0.3694
    n(n+2)=3.80
    220x+27x²=17880

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