Finding the 1th Order Derivative of Function 2(M-k)^2/(k-1)^2-2(M-k)/(k-1)+2k^2-2k on k
    Finding the 1th Order Derivative of Function 2(4-k)^2/(k-1)^2-2(4-k)/(k-1)+2k^2-2k on k
    Finding the 1th Order Derivative of Function a*(sin(x)) on x
    Finding the 1th Order Derivative of Function a*sin30 on x
    Finding the 1th Order Derivative of Function 4t/((1+t^2)^2) on t
    Finding the 2th Order Derivative of Function （x＋1）lnx-1＋x on x
    Finding the 1th Order Derivative of Function lnx（x＋1）-x＋1 on x
    Finding the 1th Order Derivative of Function -(cos(x)) on x
    Finding the 1th Order Derivative of Function 3∧lntanx on x
    Finding the 1th Order Derivative of Function xln(1/x）; on x
    Finding the 1th Order Derivative of Function （x＋1）^0.5-x^0.5 on x
    Finding the 1th Order Derivative of Function x^2+59 x-2400 on x
    Finding the 1th Order Derivative of Function x∧2/（1+x）∧2 on x
    Finding the 2th Order Derivative of Function (x+3)^4 on x
    Finding the 1th Order Derivative of Function (coslnx)^2 on x
    Finding the 1th Order Derivative of Function 2/3*1/t on t
    Finding the 1th Order Derivative of Function coslnx^2 on x
    Finding the 1th Order Derivative of Function sqrt(X^2-1) on x
    Finding the 1th Order Derivative of Function x*arctan(x) on x
    Finding the 1th Order Derivative of Function (0-x) -(0+x) +2*(0-x) ^2+2*(0-x) *(0+x) +(0+x)^2 on x

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