Finding the 1th Order Derivative of Function ln1-x/1+x on x
    Finding the 1th Order Derivative of Function tanh x on x
    Finding the 1th Order Derivative of Function ln（x/（1-x）） on x
    Finding the 1th Order Derivative of Function elnx; on x
    Finding the 1th Order Derivative of Function ln2x+ln6 on x
    Finding the 1th Order Derivative of Function (sqrt(1-x^2)); on x
    Finding the 1th Order Derivative of Function (sqrt(1-x^2))/(12-4x); on x
    Finding the 1th Order Derivative of Function (sqrt(1-x^2))/(12-4t); on x
    Finding the 1th Order Derivative of Function sinx^2/(x+1) on x
    Finding the 1th Order Derivative of Function 50-0.4t on x
    Finding the 1th Order Derivative of Function 2*（1-cosx） on x
    Finding the 1th Order Derivative of Function -sinx/x on x
    Finding the 1th Order Derivative of Function 2(1-cosx)/x∧2 on x
    Finding the 1th Order Derivative of Function （x-a）（x-b）(x-c) on x
    Finding the 1th Order Derivative of Function e^(-2x^2+3x)+x on x
    Finding the 1th Order Derivative of Function arccosx; on x
    Finding the 1th Order Derivative of Function arctanx; on x
    Finding the 1th Order Derivative of Function arcsin（2/x） on x
    Finding the 1th Order Derivative of Function arcsin2/x on x
    Finding the 1th Order Derivative of Function （1/x-1）+（2/x-2）+（3/x-3） on x

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