arctan(3^0.5*x/(2-x))+arctan(3^0.5*x/(4-x))=π/3
    x*x+1/x
    y=1
    2+x+x(2+x)
    3.4×10∧-13＝0.54∧2x÷(0.46-x)∧2
    0.992=0.02568+1.80102x-0.84364（x^2）
    (x+39.99)x＝1110
    (x+39.99)x＝11.1
    1.5X²+9X=26.53
    74.85/123.85＝x/396.162
    78.85/123.85＝x/396.162
    82.85/123.85＝x/396.162
    86.85/123.85＝x/396.162
    91.85/123.85＝x/396.162
    (2x-1/x)^8
    -sin2xcos2x-4sin2x-6x=π
    x^2-9/4x+1
    x^2-1.5x+1
    x-(x-5000)*0.1=10000
    0.6614*x^3-1.8462*x^2-1.6772*x+1.1438＝0

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