Simple-simple......How do I get the LaTeX code for an input equation? If I type in the derivative of x squared, right click and select Conversions>LaTeX I get the LaTeX code for the output, i.e. for 2x, not for the derivative of x squared. Thanks!

I assigned d as 10t like this- d:=10t How do I "unassign" d? I tried the unassign command and got this: Error, (in unassign) cannot unassign `10*t' (argument must be assignable) 10 t How do I get rid of/clear/unassign what I assigned to d?