From: nma@12000.org   
      
   On 3/4/2021 4:29 PM, Nasser M. Abbasi wrote:   
   >   
   > Only thing so far I found which I did not like too much, is   
   > when taking derivative of expression Z w.r.t say x, one   
   > has to define the derivative part w.r.t. x, on a separate line,   
   > then apply it on the expression on next line. Like this:   
   >   
   > ============   
   > @variables x y;   
   > D = Differential(x)   
   > ....few line later one can do....   
   > D(y) # Differentiate y wrt. x   
   > ==========   
   >   
   > One can't write on same line   
   >   
   >        diff(y(x),x)   
   >   
   > as normally with say Maple or Mathematica, etc... which   
   > for me is more clear since one sees the expression and the   
   > variable x, on same line. May be there is a way around   
   > this.   
      
   Ok, figured it out   
   ==========================   
   julia> using Symbolics;   
   julia> @variables x y;   
   julia> y=x^2*sin(x);   
   julia> expand_derivatives(Differential(x)(y))   
      
      
   cos(x)*(x^2) + 2x*sin(x)   
   ============================   
      
   So   
                diff(y,x)   
      
   translates to   
      
                expand_derivatives(Differential(x)(y))   
      
   --Nasser   
      
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