Finding the 1th Order Derivative of Function 1-1/（x+1） on x
    Finding the 1th Order Derivative of Function sinx; on x
    Finding the 1th Order Derivative of Function （x^2-4x+1)e^x on x
    Finding the 1th Order Derivative of Function ln(1+x/1-x) on x
    Finding the 1th Order Derivative of Function 2 1/x; on x
    Finding the 4th Order Derivative of Function lnx/x on x
    Finding the 1th Order Derivative of Function dhhjd on x
    Finding the 1th Order Derivative of Function -e-x on x
    Finding the 1th Order Derivative of Function e-x on x
    Finding the 1th Order Derivative of Function -ex on x
    Finding the 1th Order Derivative of Function ex on x
    Finding the 1th Order Derivative of Function （x+3）/（x+4） on x
    Finding the 1th Order Derivative of Function x+3/x+4 on x
    Finding the 1th Order Derivative of Function ln(sqrt(1+x^2)+x)+1 on x
    Finding the 1th Order Derivative of Function ln(sqrt(1+x^2)-x)+1 on x
    Finding the 1th Order Derivative of Function lnx+ln（2-x）+x on x
    Finding the 1th Order Derivative of Function x（e^x -1）-x^2 ÷2 on x
    Finding the 2th Order Derivative of Function sinx÷（2+cosx） on x
    Finding the 1th Order Derivative of Function sinx÷（2+cosx） on x
    Finding the 1th Order Derivative of Function 2x-1÷x on x

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