Let's vote for suggestions and bugs

[Amer7]

Fix this
in Home, or CAS i can input d1*cos(alpha) and do it differential by d1 etc. and get a correct answer.

But when I write a program using INPUT command, and setting the var type to (-1). It will accept the d1*cos(alpha)
a:=d1*cos(alpha);

And if i set my second input to be d1
b:=d1;

and write a command like c:=diff(a/b);
You get bad argument value
Keep i didnt manage to make it work with all variable types.

And you have some bug issues in latest updates, some chinese characters can appear from time to time.