My algoritm is:

#materiaalindex
$MI = "sqrt(E)/rho/H[m]";

#Doelfunctie
$DF1 = "(1/4)*H[m]*sqrt(3)*a^2*L*rho";
$DFpartial = "H[m]*a^2*rho";
$fact1 = "H[m]*rho/sqrt(E)";
$DF2 = "$fact1*sqrt(sqrt(3)*L^5*S/32)"; #omdat kleine fouten hier niet worden aangerekend, volstaat dit

#Randvoorwaarde
$fact2 = "E*a^4";
$RV1 = "$fact2*2*sqrt(3)/L^3";
$fact5="E*I";
$RV2="$fact5*C[1]/L^3";
$RVdisplay = maple("printf(MathML[ExportPresentation]($RV1))");

#Vrije Parameter
$fact3="(1/E)";
$fact4="E^(-1/4)";
$VP1="(sqrt(3)*L^3*S/6/E)^(1/4)";
$VP2="(32*sqrt(3)*L^3*S/C/E)^(1/4)";
$VP3="(32*sqrt(3)*L^3*S/C[1]/E)^(1/4)";
$VPdisplay = maple("printf(MathML[ExportPresentation]($VP1))");

For a maple graded question I want the preview to show something different then it does now. How can I manipulate the preview to get what I need.

This is what I get when stating: maple("printf(MathML[ExportPresentation]($VP1))"); 

How do I tell Maple to write it this way in a more readable format: 

Tried to use the solution. I found that there was a small mistake the gradiing code should be without the quotes

evalb(parse(StringTools:-LowerCase($RESPONSE))=parse(StringTools:-LowerCase($TA)))

but though Maple accepts the code, MapleTA does not. 

It works in TA if for example $TA = "R", but as soon as I add the multiplication - sign ($TA="R*L"), the code breaks in MapleTA. 

@jmtrik Thanks!

For one of my teachers I am looking for questions using Laplace transforms. So far, searching the MapleCloud using keywords like 'laplace' and 'inttrans' results in less then a handful hits.Is there anyone who has more?

kind regards, Meta Keijzer (TU Delft)

@Metahofzicht Nailed it. I found out how to fix it.

My grading code:

local I:=$I$:
if evalb(simplify(algsubs(I = a^4/(32*sqrt(3)), algsubs(C = 192, $RESPONSE) = $RV1))) then 1.0;
elif evalb(simplify(algsubs(I = a^4/(32*sqrt(3)), algsubs(C[1] = 192, $RESPONSE) = $RV1))) then 1.0;
elif algsubs($fact2 = 1,$RESPONSE) <> $RESPONSE then 1.0;
else 0.0;
end if;

Custom previewing code: local I:=`I `:printf(MathML[ExportPresentation]($RESPONSE));

my algoritm:

$fact2 = "E*a^4/L^3";
$RV1 = "$fact2*2*sqrt(3)";
$RVdisplay = "printf(MathML[ExportPresentation]($RV1))";

@jmtrik Hi , Jonathan. I'm trying my best to apply the procedure on other examples. But I get stuck in the following example: (introducing the parameter I - second moment of area - that needs special treatment due to the confusion with imaginairy numbers and a second substition):

Teacher's Answer               Student's Answer               Expected Grade

C[1]*E*I/L^3                       C[1]*E*I/L^3                            1.0                          C[1] equals C
C[1]*E*I/L^3                       C[1]*E*a^4/(32*sqrt(3)*L^3)    1.0                          C[1] equals C
C[1]*E*I/L^3                       6*E*a^4/(sqrt(3)*L^3)              1.0                          C[1] = 192
C[1]*E*I/L^3                       Constant*E*a^4/L^3                0.8                          Constant is any number
C[1]*E*I/L^3                       Factor*E*a^4/L^3                    0.5                          Factor is any parameter

$fact = "E*a^4/L^3";
$TA = "$fact*6/sqrt(3)";
$subslist1 = Maple("local I:='I ': I=a^4/32/sqrt(3)");
$subslist2 = "C[1] = C = 192";
$TApartial1 = "E*a^4/L^3";

#define test cases
$RESPONSE1="$TA";
$RESPONSE2="$TApartial1";
$RESPONSE3="0";

@jmtrik I have some alternative responses to the same question, that are not resembling the other options:

Teacher's Answer               Student's Answer               Expected Grade

H[m]*A*L*rho                      H[m]*A*L*rho                      1.0
H[m]*sqrt(3)/4*a^2*L*rho    H[m]*sqrt(3)/4*a^2*L*rho    1.0
H[m]*sqrt(3)/4*a^2*L*rho    H[m]*a^2*L*rho                   0.5  (the numerical factor is not relevant for the final answer to the problem)

@jmtrik Thanks Jonathan. Never could have found this myself 

In order to simplify the algorithm for partial grading of a maple graded question I would like to have part of the response of the student be 'ignored'. For instance: the following formula is the correct answer: 

. This response will give the student a full score .  In this formula the part should be correct to gain a partial score, regardless mistakes in the second part, 

Can I create a grading code that allows for that?

I was thinking of: multiplying the student response with 

and evaluating whether any of these parameters E, k or rho are still present in the adjusted student response. 

Is this possible? If yes, what's the code?

Hope anyone can help me with this