Finding the 1th Order Derivative of Function sign(x) on x
    Finding the 1th Order Derivative of Function x+1/x on x
    Finding the 2th Order Derivative of Function ln(x^2/(1-x^2)); on x
    Finding the 2th Order Derivative of Function 1/(1-x^2); on x
    Finding the 2th Order Derivative of Function 1/(1-x); on x
    Finding the 1th Order Derivative of Function 1/(1-x); on x
    Finding the 1th Order Derivative of Function 1/(1-x) on x
    Finding the 1th Order Derivative of Function 0.5xe（-0.5x） on x
    Finding the 1th Order Derivative of Function 0.5xe（-0.5x） on x
    Finding the 1th Order Derivative of Function 1/x on x
    Finding the 2th Order Derivative of Function 1/2lnx on x
    Finding the 1th Order Derivative of Function rho/8*fri*(xianzhuansu-V1)*sqrt(U1^2+(xianzhuansu-V1)^2) on rho
    Finding the 2th Order Derivative of Function 1/｛x*（x+3｝ on x
    Finding the 1th Order Derivative of Function x-e(x) on x
    Finding the 1th Order Derivative of Function 4(x^2+1) on x
    Finding the 1th Order Derivative of Function 3(x^2+1) on x
    Finding the 2th Order Derivative of Function 3(x^2+1) on x
    Finding the 1th Order Derivative of Function ln2-x/x on x
    Finding the 1th Order Derivative of Function 3(x^2+1) on x
    Finding the 1th Order Derivative of Function 1 on x

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