Items tagged with expressions expressions Tagged Items Feed

restart;
a:='a';
                               a
assume(a>0);
H:=a;
                               a
subs(a=b, H);
       ...

Hi I teach in a high school. Basically I have found that if I ask a question like: Factorize fully (x⁴-y⁴), and use a MathContainer for both the question and the answer (to be filled by students), I can't find a way to see whether the students have fully factorized the expression. Suppose (x⁴-y⁴) is in MathContainer1 and MathContainer2 is to be filled in by students. Using the code:

if GetProperty('MathContainer1','expression'...

I am not quite sure wether this question belongs into this Forum but i will post it anyway (plz just give me a hint if i am wrong here).

In the Maple file i attached i wrote a solution for the Kepler-Problem(eq1) which i developed with Maple. I isolated r and simplified the result (eq2a).

However solutions from text book look a little different (it can be seen in Whatitshouldbe). I am sure that both functions are the same (i plotted both functions...

Download problem_for.mw

I use some codes to find the coefficients of given functional expressions. But in the procedure of operation, "Error, invalid 'if' statement" is showed. How can I do to solve the error?
If this structure of code can't find the coefficients, how to get the coefficients?

P.S. the coefficients of given functional expressions like this:

given Ex:=a*x+b*y-d*z+e*y-f*x-m*z,

Is it possible that we can add or modify new expressions in the palettes?