Finding the 1th Order Derivative of Function 20ln(t+1)/(t+1)^2 on x
    Finding the 1th Order Derivative of Function chx; on x
    Finding the 1th Order Derivative of Function shx; on x
    Finding the 1th Order Derivative of Function secx; on x
    Finding the 1th Order Derivative of Function x/exp(x) on x
    Finding the 1th Order Derivative of Function 3e^3x/sin(3x) on x
    Finding the 1th Order Derivative of Function x^6(cos5x) on x
    Finding the 2th Order Derivative of Function x^2-x^4 on x
    Finding the 1th Order Derivative of Function (4x)^(2x) on x
    Finding the 1th Order Derivative of Function 4x^2x; on x
    Finding the 1th Order Derivative of Function (y-2xe^(xy))+e^(-x^2-y^2) on y
    Finding the 1th Order Derivative of Function (y-2xe^(xy))e^(-x^2-y^2) on y
    Finding the 1th Order Derivative of Function (y-2xe^xy)e^(-x^2-y^2) on x
    Finding the 1th Order Derivative of Function (y-2x^2*y)e^(-x^2-y^2) on x
    Finding the 1th Order Derivative of Function sin(1/x)^3*e-2x on x
    Finding the 1th Order Derivative of Function sin1/x^3*e-2x on x
    Finding the 1th Order Derivative of Function e-2x*sin1/x^3 on x
    Finding the 1th Order Derivative of Function cosbx on x
    Finding the 1th Order Derivative of Function arcsin（1/x） on x
    Finding the 1th Order Derivative of Function -7ln(x-1)+8ln(x-2) on x

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