So far its just a filter (restricted to use in questions - as the filter sends
python code to the server). The test I've done now works like this:
____________________
pycas:
b = 4*x**5
a =integrate(b,x)
integral = "%s" % a
integral = integral.replace("**","^")
print "a:%s" % integral
print "b:$%s$" % latex(b)
The integral of {$b} is {$a}
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The python code is run and the resulting array of strings is used to
substitute variables like {$xxx} in the question-text.
In the example we susbstitue {$a} for the integral and {$b} for the latex expression. The integral is printed as straight string (no latex) so that
the student can match it with her answer.
This displays as
_________________________________
The integral of
is |____|_________________________________
The answer is checked against (2/3)*x^6
I'll most likely make a question type that uses sympy to check the answer
so that 2/3*x^6, 4/6*x*x^5 etc will be accepted.