arccosx=0.25
    arccosx=0.25
    X-X*0.2=109
    s^3+7*s^2+10*s+10=0
    x=344
    -1.17748=1/x*ln(1-x)
    -1.152921014=1/x*ln(1-x)
    （sinx）^7
    -1.109=1/x*ln(1-x)
    -1.1133=1/x*ln(1-x)
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=62088.31
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=232265.77
    (42480505-1659797.22-826289.04-55291.68-4628387.01-2842528.67-x)*0.033=23187306.02-x
    x∧2÷（0.05－x）＝2.95×10∧－8
    sinx=0.95x
    1200*sin(x)+905*cos（x）=1062
    1200*sin(x)+905*cos（x）=1060
    1200*sin(x)+905*cos（x）=1060
    4x+x/2
    3x∧2＋2.52x-1.32＝0

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