Multinumerical

This question type allows asking questions such as :
Please enter X, Y, and Z, such as :
X + Y + Z > 12
This question type allows asking questions such as :
Please enter X, Y, and Z, such as :
X + Y + Z > 12
X – Y <= 3
Z = [0;100] (Z is between 0 and 100, included)
For each constraint, a feedback can be generated, displaying some text for a condition being fulfilled, and some other text if not.
The grading can be set to be one of the following :
100% (all constraints fulfilled) or 0%
grade = (amount of constraints fulfilled) / (total amount of constraints)