Finding the 1th Order Derivative of Function 4+x^2-2*y+2*y^2-2*x-x*y on x
    Finding the 1th Order Derivative of Function ln[（1-x）/2] on x
    Finding the 1th Order Derivative of Function -xln(-x) on x
    Finding the 1th Order Derivative of Function 6sinX - 2cos2X on x
    Finding the 1th Order Derivative of Function 3sinX+tan2X on x
    Finding the 1th Order Derivative of Function ((x^2+3*a)*x)/(3*x^2+a) on x
    Finding the 1th Order Derivative of Function ((x^2+3*a)*x)/((3*x^2+a)^2) on x
    Finding the 1th Order Derivative of Function 5*x/(1200+x) on x
    Finding the 1th Order Derivative of Function 5X/(X+1200) on x
    Finding the 2th Order Derivative of Function sinx/cosx^2+1/2*(ln(tan(x/2+pi/4))) on x
    Finding the 2th Order Derivative of Function sinx/cosx^2+1/2*ln(tan(x/2+pi/4)) on x
    Finding the 2th Order Derivative of Function sinx/cosx^2+1/2ln(tan(x/2+pi/4)) on x
    Finding the 2th Order Derivative of Function sinx/cosx^2 on x
    Finding the 1th Order Derivative of Function lgx/x on x
    Finding the 1th Order Derivative of Function x^2（sin1/x） on x
    Finding the 1th Order Derivative of Function (1/(sqrt(x^2-e)))-((x^2)/((x^2-e)^(3/2)))))) ) on x
    Finding the 1th Order Derivative of Function x/sqrt(x^2-e) on x
    Finding the 1th Order Derivative of Function sqrt(x^2-E) on x
    Finding the 1th Order Derivative of Function 5（x+120）/（x+120+1200）-5x/（x+1200） on x
    Finding the 1th Order Derivative of Function 5（x+120）/（x+120+1200） on x

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