y = loge^(sqrt(x^3+4)) ; dy/dx(logx) =1/xln10*d/dx(x)
dy/dx = 1/e^((sqrt(x^3+4)*ln10)*d/dx(e^(sqrt(x^3+4))=
e^(sqrt(x^3+4))/e^sqrt(x^3+4)*ln10)*d/dx(sqrt(x^3+4))=
(1/ln10)*d/dx(((x^3+4)^(1/2))=
(1/2ln10)*(x^3+4)^(1/2 - 1)*d/dx(x^3+4)=
(1/2ln10)(x^3+4)^(-1/2)*3x^2 =
(3x^2)/((2ln10(x^3+4)^(1/2))=
(3x^2)/(2ln10sqrt(x^3+4)