y = x^2
show(y)

In a worksheet in the notebook, this shows x and then a small raised
two.
I'd like it to show 'y = ' and then that symbol.

eqn = y == x^2
show(eqn)

does what I want (y=x^2)

But the upper code (y=x^2) lets me operate on it (y(3), diff(y), etc.)
wherease y==x^2 does not.

This gets more important with longer more complex equations. For
example:

D(H,mu,alpha,x,y,z) = (H*pi*mu*alpha)/(x*y + z^3)

When displaying it, it would be nice to see:
D = ...
But instead I see
(H,mu,alpha,x,y,z) |-> ...

Which isn't clear to someone reading the worksheet that the LHS is D.

Any hints how to more clearly show() or pretty_print() some equations
will be much appreciated.

Thanks,

   -k.

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