Finding the 1th Order Derivative of Function arctan(1+x/1-x) on x
    Finding the 1th Order Derivative of Function cosx; on x
    Finding the 1th Order Derivative of Function lnx／（x－1） on x
    Finding the 1th Order Derivative of Function lnx／x－1 on x
    Finding the 1th Order Derivative of Function (25000q-q^2）/200-25q-7000 on x
    Finding the 1th Order Derivative of Function In(1+x^2) on x
    Finding the 1th Order Derivative of Function In(1+x^2) +1/(1+x2) −1 on x
    Finding the 1th Order Derivative of Function In(1+x2)+1/(1+x2)−1 on x
    Finding the 1th Order Derivative of Function In(1+x^2) +1/(1+x^2)-1 on x
    Finding the 1th Order Derivative of Function In(1+x^2)+1/1+x^2-1 on x
    Finding the 10th Order Derivative of Function x^3*sin2x on x
    Finding the 1th Order Derivative of Function tcost on x
    Finding the 1th Order Derivative of Function sqrt(x^2-4x+40)+sqrt(x^2+4x+8) on x
    Finding the 1th Order Derivative of Function xsin（cosx） on x
    Finding the 1th Order Derivative of Function actsin（actcosx） on x
    Finding the 1th Order Derivative of Function sin(2x/(x^2+1)) on x
    Finding the 2th Order Derivative of Function -2x^3+39x^2-180x+4 on x
    Finding the 2th Order Derivative of Function -2x^3+24x^2-42x+7 on x
    Finding the 1th Order Derivative of Function 3^x／ln3 on x
    Finding the 1th Order Derivative of Function x-3/2x2/3 on x

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