Hi all! I've found a strange issue in some problems requiring formula response.
I have a simple question to enter the formula for the resonant frequency. An example of correct answer is (in other variations the formula could be a bit more complex than this one) 1/(2*pi*sqrt(L*C)) The correct solution is checked by sampling L and C values. When I am entering the answer, I can see that LON-CAPA recognizes it because it displays the formatted formula as I am entering it: [cid:image003.jpg@01D5A05B.449F5B20] But when I press submit, I got the response: “unable to understand formula” By experimenting with this, I found that the issue happens because of “pi” being a part of the answer. If pi is replaced with 3.141, everything would work. But it feels weird asking students to enter 3.141 instead of pi; besides, I don’t even want to give them a hint that pi is a part of the answer. Why is this happening? Apparently LON-CAPA knows what “pi” means because it displays it correctly. Thanks! Grigory
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