Finding the 1th Order Derivative of Function -1/（1+x）^2; on x
    Finding the 2th Order Derivative of Function e^( 2 *x + y)*cos(t) on y
    Finding the 1th Order Derivative of Function (1+x^0.5)/(1-x^0.5) on x
    Finding the 1th Order Derivative of Function x^2lnx/x on x
    Finding the 1th Order Derivative of Function tan((1/4)x-1) on x
    Finding the 1th Order Derivative of Function 6/(x∧2-2x＋4) on x
    Finding the 1th Order Derivative of Function (x-1)/(x∧2-2x＋4)∧3 on x
    Finding the 2th Order Derivative of Function e^( 2*x + y^2)*cos(t) on y
    Finding the 2th Order Derivative of Function e^( x^2 + 2 * y)*cos(t) on x
    Finding the 2th Order Derivative of Function e^(2*x+y)*cos(t) on y
    Finding the 2th Order Derivative of Function e^(2*x+y)*sin(t) on x
    Finding the 1th Order Derivative of Function In((1+sqrt(x))/(1-sqrt(x)) on x
    Finding the 1th Order Derivative of Function ((x/3)+1)^2/5; on x
    Finding the 1th Order Derivative of Function -30.31*x^3 +81.46*x^2- 68.91*x+ 18.79; on x
    Finding the 1th Order Derivative of Function (cos(x^2))^2 on x
    Finding the 1th Order Derivative of Function In(tan(x/2)) on x
    Finding the 1th Order Derivative of Function sqrt(x^2-2*x+5) on x
    Finding the 1th Order Derivative of Function sqrt(3*x^2+cos(x)) on x
    Finding the 1th Order Derivative of Function sin(sqrt(x))^2 on x
    Finding the 1th Order Derivative of Function sin(sqrt(x)^2 on x

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