Task: Question Answering
Input (English): Question: a^2*b^2+a^2+b^2=259
b^2*c^2+b^2+c^2=1299
c^2*a^2+c^2+a^2=499
then find a+b+c=?

 Option A: 13

 Option B: 14

 Option C: 15

 Option D: 16

 Option E: 17
Output (English): Option C